feat: Typing for MQTT API

[Nerivec]

• Types for the entire MQTT API
  • Some currently unused to avoid too much refactoring in current PR but available for future (tried to minimize actual code changes in this one)
  • Exported for easy access by 3rd parties using package
  • Should eventually allow to create a script for docs that automatically parses the interface and updates the doc page
• Remove small request lookups (externalJS, networkMap) in favor of plain calls for better typing
• Fix configure payload validation (+test)
• Fix external JS save/remove payload validation (+tests)
• Remove unused global types

TODO:

• Remove request lookup for bridge for better typing too (switch statement instead)?
• Some typing is not possible/ideal due to current handling (can progressively refactor).
• HA extension not typed. Too much dynamic/inferred, probably will require special handling...

[Koenkk]

Thanks!

[Nerivec]

For future refactoring, I'm thinking we should probably have something like this.mqtt.publishResponse that absorbs both the utils.getResponse and stringify, and allows proper typing based on API endpoint. It probably would also allow short-circuiting some of the logic in this.mqtt.publish that never applies for responses.

Some places are still using "old JS", where no-typing allowed many possible uses at once, we'll likely have to refactor that too (like bridge.ts). That should progressively remove the dependency on KeyValue and KeyValueAny types, at the cost of a few more lines of code to ensure proper type-checking.