Send notification on missedBlock, createdBlock and node start and node stop

[shuse2]

Description

• Create hook for:
  • registered forger missing block
  • registered forger creating block
  • node start
  • node stop
• Call webhook with the below schema:

// Create block
{ event: “forger:block:created”, time: 134, payload: { height: 1, reward: 10, address: '' } }
// Missed block
{ event: “forger:block:missed”, time: 134, payload: { height: “”, address: '' } }
// Node action
{ event: “forger:node:start”, time: 134, payload: { reason: “” } }
{ event: “forger:node:stop”, time: 134, payload: { reason: “”  } }

User-Agent should be in format of

${plugin-name}/${plugin-version} ${${os.platform()} ${os.release()}; ${os.arch()}${locale}} lisk-framework/${lisk-framework-version}

lisk-framework-forger-plugin/0.1.0 (darwin 19.5.0; x64 en_US.UTF-8) lisk-framework/0.5.0-alpha.0

Motivation

This event is required in order to notify external services about forging related changes.

Acceptance Criteria

• Add unit tests to check if the hook is fired by each of the registered forgers
• Check if the webhook is called by registering to the framework
• Emit all events to webhook if events is empty and filter and emit specific events when specified, ex: events: ['forger:block:missed']

Additional Information

Related issues: #5215