docs: move the package docs to root of repo #4

Job	Run time
js-test-and-release / check	1m 52s
js-test-and-release / test-electron-main	43s
js-test-and-release / test-electron-renderer	30s
js-test-and-release / test-chrome-webworker	34s
js-test-and-release / test-chrome	46s
js-test-and-release / test-firefox	43s
js-test-and-release / test-firefox-webworker	44s
js-test-and-release / test-node (windows-latest, lts/*)	2m 27s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 20s
js-test-and-release / test-node (ubuntu-latest, lts/*)	37s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 16s
js-test-and-release / test-node (macos-latest, lts/*)	2m 29s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 21s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 37s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	18m 59s

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