CosmWasm core: Documentation outline

[aumetra]

Tracking issue for a basic outline of the documentation:

• Installation
• Entrypoints
  • Overview
  • Instantiate (Add documentation for entrypoints #13)
  • Execute (Add documentation for entrypoints #13)
  • Query (Add documentation for entrypoints #13)
  • Migrate (Add documentation for entrypoints #13)
  • Sudo (Add documentation for entrypoints #13)
• Architecture
  • Actor model (Basic actor model docs #24)
  • Events and attributes
  • Data
• Standard library
  • Overview (Cryptography documentation #26)
  • Math
    • Overview (Barebones documentation for math types #33)
    • Decimals
      • Overview (Barebones documentation for math types #33)
    • Integers
      • Overview (Barebones documentation for math types #33)
  • Cryptography
    • Overview (Cryptography documentation #26)
    • P256
      • Overview (Cryptography documentation #26)
      • Key recovery example
      • Verification example
    • K256 (Cryptography documentation #26)
    • Ed25519 (Cryptography documentation #26)
    • BLS12-381
      • Overview (Cryptography documentation #26)
      • Hash-to-curve example
      • Point aggregation example
      • Pairing equality example
• Advanced
  • Overview (Add documentation about measuring time #35)
  • Measuring time (Add documentation about measuring time #35)
• Specifications
  • Overview
  • instantiate2 algorithm (see Document Instantiate2 algorithm #30)

[aumetra]

The following things will only get a placeholder documentation until CW 2.1 is released:

• P256
• BLS12-381

Because we have no way to reliably doc-test them yet, and I would rather not have any examples instead of wrong ones.

[aumetra]

Other topics:

• Verifying the contract is well formed (cosmwasm-check)
• Page of best practices

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Should we show off how to do basic operations with CosmWasm utilities? Probably.
Something like sending funds? Because we already kinda cover how to call other contracts.