feat: add component logger

[achingbrain]

When running multiple libp2p instances simultaneously it's often hard to work out which log messages come from which instance. This PR solves the problem.

• Adds a ComponentLogger interface to libp2p which is an object that lets a component get a logger specific to that component.
• Adds an optional logger config key to libp2p which is an implementation of ComponentLogger.
• Adds three implementations of ComponentLogger
  • defaultLogger - this preserves existing logging behaviour
  • peerLogger - this prefixes all log lines with a truncated peer id
  • prefixLogger - this prefixes all log lines with an arbitrary string

libp2p uses the passed logger if one is configured, otherwise it uses defaultLogger to make this change backwards compatible.

The logger is added to the components map so libp2p components can accept it as part of their required components and use the forComponent function to create a component-specific logger.

It will take a bit of time to thread the use of ComponentLogger throughout the monorepo, but this can be done in follow-up PRs since the existing logging behaviour is maintained by the changes here.

For v1.x we may switch to peerLogger.

Refs #2105

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[maschad]

very useful feature, great work. I left some comments and suggestions.