AG-15580 finalize new lib

Squashed commit of the following:

commit 08ece31b61a67f606943e7947afddb7f721da112
Author: Slava Leleka <[email protected]>
Date:   Fri Aug 5 12:13:27 2022 +0300

    improve comment about ExtendedCss.validate(selector)

commit d9893b0ccfc92434d29cade38f6162d4e6b8d595
Author: Slava Leleka <[email protected]>
Date:   Fri Aug 5 12:09:31 2022 +0300

    fix readme

commit 7da1cc979d0c3172016d296750eb935bbbabfd5b
Merge: a45e437 fe3651d
Author: Slava Leleka <[email protected]>
Date:   Fri Aug 5 12:03:49 2022 +0300

    merge epic into fix/AG-15580

commit a45e4377249b98bfa49f8ac76388e21324b79d0a
Author: Slava Leleka <[email protected]>
Date:   Thu Aug 4 21:38:55 2022 +0300

    update tests

commit ef0f14027d693abd012f5d4d42e20c267f2b7279
Author: Slava Leleka <[email protected]>
Date:   Thu Aug 4 21:38:42 2022 +0300

    clean up comments

commit eae100133cfc7d19c60af789d7b4766460cc7506
Author: Slava Leleka <[email protected]>
Date:   Thu Aug 4 21:38:04 2022 +0300

    update readme

commit 449ce46f1265b2287a945d118568ef66056fdb9f
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 14:53:32 2022 +0300

    clean package.json

commit 947d148f425e511995fa9f7a8cbac5132c721ab5
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 14:52:59 2022 +0300

    update devDependencies

commit 6a9220d59dca7078f8beed58e26b0f6e838385be
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 14:29:48 2022 +0300

    fix test/extended-css.test.ts, remove jest.config.js

commit 3d48b3726ddc6042dddc5b25f5e44451491f6145
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 13:49:33 2022 +0300

    update rollup-plugin-ts

commit 4666511d959fed31a9ee8e82baef796b74657e12
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 11:20:31 2022 +0300

    increase engines node version up to 14

commit 2677cdac6568439ccb36fa03ba45286123174a3c
Author: Slava Leleka <[email protected]>
Date:   Tue Aug 2 11:14:47 2022 +0300

    fix gitignore

commit 47d12b2573afd577eeb701783ad0e92e49e9b936
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:43:44 2022 +0300

    use dist dir for tests instead of build

commit cf2678436500388d37c4f49d8f0c54109146d2cf
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:41:46 2022 +0300

    fix scripts

commit 53156ffdc5206b69331f2a7b05da6250ea029ed3
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:27:10 2022 +0300

    fix rollup config

commit cf03cdc7504e3ec8abc2fa346d3f1d445654fa0a
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:24:54 2022 +0300

    remove old lib

commit baa63d000b06c5a6d776ecda34406f9aedf33293
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:16:02 2022 +0300

    fix TEST_TEMP_DIR for server

commit 910d69d109e35ef275a939b74d9c16aab68821e9
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 19:00:53 2022 +0300

    rename extCSS -> testExtCss for playwright tests

commit 8d826179f135a856eef969e8645d0e9e2e832b8b
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 18:01:17 2022 +0300

    move new tests

commit a9ee8b48f150f28e56029c6e6ce1c92f4a18cbe4
Author: Slava Leleka <[email protected]>
Date:   Mon Aug 1 17:47:49 2022 +0300

    remove old tests

... and 3 more commits

.eslintignore

@@ -1,6 +1,3 @@
 node_modules/*
-build/*
 dist/*
-lib/sizzle.patched.js
-test/qunit/*
-test/build/*
+test/dist/*

.gitignore

@@ -2,5 +2,5 @@
 .vscode
 .env
 node_modules
-build
 yarn-error.log
+test/dist

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname "$0")/_/husky.sh"
+
+yarn lint-staged