build: add license headers and NOTICE file

[markov00]

Summary

This PRs add the required license header on every source code file of the repo.
It also correct the text for the apache license and add a NOTICE file with the bundled/based code incorporated into the library.

It also add an eslint rule to fix/lint any new file with that header.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@8b747af). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #582   +/-   ##
=========================================
  Coverage          ?   71.38%           
=========================================
  Files             ?      214           
  Lines             ?     6258           
  Branches          ?     1206           
=========================================
  Hits              ?     4467           
  Misses            ?     1772           
  Partials          ?       19

Impacted Files	Coverage Δ
src/components/icons/assets/empty.tsx	66.66% <ø> (ø)
src/index.ts	100% <ø> (ø)
...rc/chart_types/xy_chart/renderer/dom/crosshair.tsx	79.16% <ø> (ø)
src/state/selectors/get_internal_tooltip_info.ts	75% <ø> (ø)
...hart_types/partition_chart/layout/utils/treemap.ts	10.9% <ø> (ø)
src/mocks/series/utils.ts	88.88% <ø> (ø)
.../chart_types/xy_chart/renderer/dom/highlighter.tsx	82.14% <ø> (ø)
...pes/xy_chart/state/selectors/is_tooltip_visible.ts	100% <ø> (ø)
src/specs/specs_parser.tsx	100% <ø> (ø)
src/chart_types/xy_chart/legend/legend.ts	92.1% <ø> (ø)
... and 183 more

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[rshen91]

LGTM!

[markov00]

🎉 This PR is included in version 18.0.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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