Add lint to CI and fix errors

[HarelM]

Adds lint to CI and fixes errors. I'm not sure I'm fully proud of all the solutions there. But there's no lint issues and the lint is being checked as part of the CI.

[codesandbox-ci[bot]]

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Latest deployment of this branch, based on commit 72bb15ec6d4355620d3b40340c5e8ae0049ec4c2:

Sandbox	Source
maputnik	Configuration

[codecov-commenter]

Codecov Report

Attention: 54 lines in your changes are missing coverage. Please review.

Comparison is base (a324ddb) 56.71% compared to head (72bb15e) 56.81%.

Files	Patch %	Lines
src/libs/apistore.ts	0.00%	12 Missing :warning:
src/components/ModalSources.tsx	58.33%	5 Missing :warning:
src/components/App.tsx	73.33%	4 Missing :warning:
src/components/MapMaplibreGlLayerPopup.tsx	20.00%	4 Missing :warning:
src/components/ModalOpen.tsx	80.00%	3 Missing :warning:
src/components/_ExpressionProperty.tsx	0.00%	3 Missing :warning:
src/libs/metadata.ts	70.00%	3 Missing :warning:
src/libs/urlopen.ts	57.14%	3 Missing :warning:
src/util/codemirror-mgl.ts	0.00%	3 Missing :warning:
src/components/IconLayer.tsx	33.33%	2 Missing :warning:
... and 8 more

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #853 +/- ## ========================================== + Coverage 56.71% 56.81% +0.09% ========================================== Files 104 104 Lines 2932 2929 -3 Branches 674 674 ========================================== + Hits 1663 1664 +1 + Misses 1269 1265 -4 ```

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