Transparent video read/write support (#145)

* Add support for reading transparent Matroska and implement alpha side data & decode

* Few fixes

* Implement alpha encoding

* Gracefully handle inability to acquire WebGL context, properly clean up WebGL contexts

* Improve touch device detection

* Test test

* Test test #2

* Test test 3

* Test test 4

* Test test 5

* Test test 6

* Test test 7

* Test test 8

* Test test 9

* Test test 10

* Test test 11

* Test test 12

* Test test 13

* Test test 14

* Test test 15

* Test test 16

* Test test 17

* Test test 18

* Test test 19

* Test test 20

* Fix type errors, improve MetadataTags docs

* Do a bunch of docs work

* Test test?

* "Unexpected only modifier 🤓"

* Add InputVideoTrack.canBeTransparent()

* Some clean-up

* Adjust CI to be less spammy in PRs

* Fix broken license headers

vitest.config.ts

@@ -0,0 +1,34 @@
+/// <reference types="@vitest/browser/providers/webdriverio" />
+
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+	test: {
+		projects: [
+			{
+				test: {
+					name: 'node',
+					root: 'test',
+					include: ['node/**/*.test.ts'],
+					environment: 'node',
+				},
+			},
+			{
+				test: {
+					name: 'browser',
+					root: 'test',
+					include: ['browser/**/*.test.ts'],
+					browser: {
+						enabled: true,
+						provider: 'webdriverio',
+						instances: [{
+							browser: 'chrome',
+						}],
+						headless: false, // A bunch of features need the head
+						screenshotFailures: false,
+					},
+				},
+			},
+		],
+	},
+});