refactor: project rewrite in TypeScript

[artus9033]

Describe your changes

This PR carries the following changes:

• a long-awaited rewrite of the project in TypeScript (closes #121, closes #145)
  • adds proper typings & declaration files that finally provide proper Chart.js module type augmentations 🚀
• makes CI workflow run on pull_request trigger, manual dispatch & for pushes to master
• adds checkDraggingConfiguration helper & proper unit tests
• reduces E2E tests count due to long running times in GH Actions, by making all 3 magnet variations scenarios run only in combination with both-axes-draggable scenarios, while for the variations of scenarios where only one axis is draggable, the magnet will be disabled; this drastically reduces the number of test cases to ~4.5k (from ~10k), while the removed cases were of low benefit
• downgrades codecov action to v3 due to constant 500 ISE when uploading reports, effectively breaking coverage tracking
• adds proper exports to package.json

Linked issues (if any)

• 145

• 121

Checklist before requesting a review

• [x] E2E tests' snapshots (screenshots) are up-to-date
• [x] documentation is up-to-date

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.49123% with 8 lines in your changes missing coverage. Please review.

Project coverage is 96.49%. Comparing base (8a62d9f) to head (30ade25). Report is 1 commits behind head on master.

Files	Patch %	Lines
src/util/updateData.ts	83.33%	4 Missing :warning:
src/util/getElement.ts	96.55%	2 Missing :warning:
src/util/applyMagnet.ts	92.30%	1 Missing :warning:
src/util/calc/cartesian.ts	97.77%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #146 +/- ## ========================================== + Coverage 92.68% 96.49% +3.80% ========================================== Files 1 11 +10 Lines 205 228 +23 Branches 78 109 +31 ========================================== + Hits 190 220 +30 + Misses 15 8 -7 ```

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[Megaemce]

Allelujah!