chore: type checks as part of the build

[webbertakken]

Changes

• Adds ability to get type definitions from HA instance and check types during the build
• Resolves Build process should type check #7
• yarn build will locally always do the typechecks as part of the docker build (since you always have .env set.)
• In CI it's a bit different - it'll still work out of the box, however:

because you need to have a publicly https-exposed HA instance, which means either Nabu Casa or a ton of manual work and maintenance. If you have Nabu Casa, you can simply put the Nabu Casa entrypoint to your HA Instance as the HASS_BASE_URL with the appropriate HASS_TOKEN and you're good to go; your CI will now fully check the integrity of your application in CI. When they are not set, they will simply be skipped. THIS MEANS YOUR BUILD DOESN'T HAVE TYPECHECKS IN CI, so recommend setting them.

This will be documented properly.

• Move Dockerfile to the root
• Move scripts completely into package.json
• Remove /tools/ folder completely

Checklist

• Read the contribution guide and accept the
  code of conduct
• Readme and docs (updated or not needed)
• Tests (added, updated or not needed)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 12.85%. Comparing base (1b6ef99) to head (76a9433).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #12      +/-   ##
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+ Coverage   11.61%   12.85%   +1.24%     
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  Files           5        3       -2     
  Lines         155      140      -15     
  Branches        5        2       -3     
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  Hits           18       18              
+ Misses        133      120      -13     
+ Partials        4        2       -2