lint: add eslint to typescript files

[zoran995]

What this PR does

Fixes #3303 Fixes #4565

IMHO this is something that should be done long time ago. There is still 89 issues (57 errors, 32 warnings) (https://github.com/zoran995/terriajs-i18n/runs/7266057805?check_suite_focus=true). I have removed the rules that are active from eslint:recommended, and sepparated config for javascript and typescript files. Lot of issues were fixable using eslint -fix.

Gulp was complaining that it can't find eslint/bin/eslint.js (something like that) so I moved it to lint script in package.json From what I see it was only used as part of ci.yml and npm-publish.yml scripts.

Checklist

• ~[ ] There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)~
• ~[ ] I've updated relevant documentation in doc/.~
• [ ] I've updated CHANGES.md with what I changed.
• ~[ ] I've provided instructions in the PR description on how to test this PR.~

[zoran995]

this is the current state

issue type	count
@typescript-eslint/no-unused-vars	27
react-hooks/exhaustive-deps	16
@typescript-eslint/ban-ts-comment	11
react/display-name	8
no-constant-condition	3
@typescript-eslint/no-non-null-asserted-optional-chain	3
react/jsx-no-useless-fragment	2
react/jsx-key	2
@typescript-eslint/ban-types	1
no-ex-assign	1
no-new	1
no-fallthrough	1
react/no-children-prop	1
react-hooks/rules-of-hooks	1
no-empty	1
no-empty-pattern	1

[zoran995]

superseded by https://github.com/TerriaJS/terriajs/pull/6985