API: create extended library for node

[blueridger]

Description

Up until now, we've only been adding modules to our library that are browser compatible, because we've used the same export for both web and node. This has meant that 3rd-party developers working in a node environment have been missing out on some SUPER USEFUL stuff that we've built.

This PR:

• moves api/index.js to api/lib/base.js
• creates a new api/lib/node.js module that extends the base with useful modules that aren't browser friendly, and updates the node build to use this
• adds a yarn shell command to packages/sourcecred, which opens a node shell with both the web and node builds already imported as sc and scClient, respectively.

Test plan

yarn build && yarn shell
Results in spoilers:

sc

$ sc
{
  api: {
    graph: Object [Module] {
      graph: [Getter],
      _hackyIdentityNameReferenceDetector: [Getter]
    },
    credrank: Object [Module] { credrank: [Getter] },
    grain: Object [Module] {
      grain: [Getter],
      executeGrainIntegrationsFromGrainInput: [Getter]
    }
  },
  instance: {
    readInstance: Object [Module] {
      getNetworkReadInstance: [Getter],
      getOriginReadInstance: [Getter],
      ReadInstance: [Getter]
    },
    LocalInstance: [class (anonymous) extends Ud]
  },
  core: {
    address: Object [Module] { makeAddressModule: [Getter] },
    algorithm: {
      markovChain: [Object [Module]],
      graphToMarkovChain: [Object [Module]]
    },
    graph: Object [Module] {
      NodeAddress: [Getter],
      EdgeAddress: [Getter],
      Direction: [Getter],
      Graph: [Getter],
      nodeToString: [Getter],
      edgeToString: [Getter],
      edgeToStrings: [Getter],
      edgeToParts: [Getter],
      compareGraphs: [Getter]
    },
    weightedGraph: Object [Module] {
      empty: [Getter],
      toJSON: [Getter],
      fromJSON: [Getter],
      merge: [Getter],
      overrideWeights: [Getter]
    },
    weights: Object [Module] {
      edgeWeightParser: [Getter],
      empty: [Getter],
      copy: [Getter],
      merge: [Getter],
      parser: [Getter],
      toJSON: [Getter],
      fromJSON: [Getter],
      compareWeights: [Getter]
    },
    credGraph: Object [Module] {
      CredGraph: [Getter],
      jsonParser: [Getter],
      parser: [Getter]
    },
    CredGrainView: [class lh]
  },
  ledger: {
    ledger: Object [Module] { Ledger: [Getter] },
    identity: Object [Module] {
      identityIdParser: [Getter],
      delimitedIdentityIdParser: [Getter],
      newIdentity: [Getter],
      contractions: [Getter],
      graphNode: [Getter],
      identityParser: [Getter],
      IDENTITY_PREFIX: [Getter],
      identityTypeParser: [Getter],
      nameFromString: [Getter],
      nameParser: [Getter],
      aliasParser: [Getter]
    },
    grain: Object [Module] {
      ZERO: [Getter],
      DECIMAL_PRECISION: [Getter],
      ONE: [Getter],
      add: [Getter],
      sub: [Getter],
      mul: [Getter],
      div: [Getter],
      lt: [Getter],
      gt: [Getter],
      lte: [Getter],
      gte: [Getter],
      eq: [Getter],
      fromString: [Getter],
      format: [Getter],
      formatAndTrim: [Getter],
      multiplyFloat: [Getter],
      divideFloat: [Getter],
      fromInteger: [Getter],
      fromFloatString: [Getter],
      fromApproximateFloat: [Getter],
      toFloatRatio: [Getter],
      splitBudget: [Getter],
      sum: [Getter],
      parser: [Getter]
    },
    utils: Object [Module] {
      diffLedger: [Getter],
      ensureIdentityExists: [Getter],
      distributions: [Getter]
    },
    manager: Object [Module] { LedgerManager: [Getter] },
    storage: Object [Module] { GithubStorage: [Getter] }
  },
  plugins: {
    ConstructorPlugin: [class ConstructorPlugin],
    github: {
      declaration: [Object [Module]],
      edges: [Object [Module]],
      nodes: [Object [Module]],
      GithubPlugin: [class pm]
    },
    ethereum: { declaration: [Object [Module]], utils: [Object [Module]] },
    discourse: {
      address: [Object [Module]],
      declaration: [Object [Module]],
      DiscoursePlugin: [class xg]
    },
    discord: {
      declaration: [Object [Module]],
      utils: [Object [Module]],
      DiscordPlugin: [class Fg]
    },
    initiatives: { declaration: [Object [Module]], InitiativesPlugin: [class Ty] },
    declarationParser: z { _f: [Function (anonymous)], _phantomT: undefined },
    identityProposalsParser: z { _f: [Function (anonymous)], _phantomT: undefined },
    coerceNameFromString: [Function: gn]
  }
}

scClient

$ scClient
{
  api: {
    graph: Object [Module] {
      graph: [Getter],
      _hackyIdentityNameReferenceDetector: [Getter]
    },
    credrank: Object [Module] { credrank: [Getter] },
    grain: Object [Module] {
      grain: [Getter],
      executeGrainIntegrationsFromGrainInput: [Getter]
    }
  },
  instance: {
    readInstance: Object [Module] {
      getNetworkReadInstance: [Getter],
      getOriginReadInstance: [Getter],
      ReadInstance: [Getter]
    }
  },
  core: {
    address: Object [Module] { makeAddressModule: [Getter] },
    algorithm: {
      markovChain: [Object [Module]],
      graphToMarkovChain: [Object [Module]]
    },
    graph: Object [Module] {
      NodeAddress: [Getter],
      EdgeAddress: [Getter],
      Direction: [Getter],
      Graph: [Getter],
      nodeToString: [Getter],
      edgeToString: [Getter],
      edgeToStrings: [Getter],
      edgeToParts: [Getter],
      compareGraphs: [Getter]
    },
    weightedGraph: Object [Module] {
      empty: [Getter],
      toJSON: [Getter],
      fromJSON: [Getter],
      merge: [Getter],
      overrideWeights: [Getter]
    },
    weights: Object [Module] {
      edgeWeightParser: [Getter],
      empty: [Getter],
      copy: [Getter],
      merge: [Getter],
      parser: [Getter],
      toJSON: [Getter],
      fromJSON: [Getter],
      compareWeights: [Getter]
    },
    credGraph: Object [Module] {
      CredGraph: [Getter],
      jsonParser: [Getter],
      parser: [Getter]
    },
    CredGrainView: [class nh]
  },
  ledger: {
    ledger: Object [Module] { Ledger: [Getter] },
    identity: Object [Module] {
      identityIdParser: [Getter],
      delimitedIdentityIdParser: [Getter],
      newIdentity: [Getter],
      contractions: [Getter],
      graphNode: [Getter],
      identityParser: [Getter],
      IDENTITY_PREFIX: [Getter],
      identityTypeParser: [Getter],
      nameFromString: [Getter],
      nameParser: [Getter],
      aliasParser: [Getter]
    },
    grain: Object [Module] {
      ZERO: [Getter],
      DECIMAL_PRECISION: [Getter],
      ONE: [Getter],
      add: [Getter],
      sub: [Getter],
      mul: [Getter],
      div: [Getter],
      lt: [Getter],
      gt: [Getter],
      lte: [Getter],
      gte: [Getter],
      eq: [Getter],
      fromString: [Getter],
      format: [Getter],
      formatAndTrim: [Getter],
      multiplyFloat: [Getter],
      divideFloat: [Getter],
      fromInteger: [Getter],
      fromFloatString: [Getter],
      fromApproximateFloat: [Getter],
      toFloatRatio: [Getter],
      splitBudget: [Getter],
      sum: [Getter],
      parser: [Getter]
    },
    utils: Object [Module] {
      diffLedger: [Getter],
      ensureIdentityExists: [Getter],
      distributions: [Getter]
    },
    manager: Object [Module] { LedgerManager: [Getter] },
    storage: Object [Module] { GithubStorage: [Getter] }
  },
  plugins: {
    ConstructorPlugin: [class ConstructorPlugin],
    github: {
      declaration: [Object [Module]],
      edges: [Object [Module]],
      nodes: [Object [Module]]
    },
    ethereum: { declaration: [Object [Module]], utils: [Object [Module]] },
    discourse: { address: [Object [Module]], declaration: [Object [Module]] },
    discord: { declaration: [Object [Module]], utils: [Object [Module]] },
    initiatives: { declaration: [Object [Module]] },
    declarationParser: q { _f: [Function (anonymous)], _phantomT: undefined },
    identityProposalsParser: q { _f: [Function (anonymous)], _phantomT: undefined },
    coerceNameFromString: [Function: we]
  }
}

[hozzjss]

All looks really good thanks for this!!