fix: enable eslint and follow it's errors

[auto200]

• set up formatting scripts but did not format whole project yet since there would be too much noise in the diff for this PR

• eslint config was broken and did not report errors, used minimal https://typescript-eslint.io/ setup since core package does not use react (yet)
  

• created proper types to replace anys

• CustomEvent.trackEvent now properly accepts dimensions as a parameter, updated docs and example

caveat

when bundling with microbundle-crl type information about Dimensions type gets lost

type Dimensions = Record<`dimension${number}`, string>

dist/interfaces/utils.d.ts

resulting with any type

confirmed with regular tsc build and it gets compiled properly. We could consider switching microbundle-crl to something else

[lysy-vlc]

How about using vite? We already have conf files from vue package

[auto200]

How about using vite? We already have conf files from vue package

That's a solid option to consider, can we postpone it until we extract core package? Definitely in the separate PR, not to do everything at once