docs: add mpv.launchMode to config docs, add changelog:docs generator, format

- Document the new mpv.launchMode option in the configuration docs page
- Add changelog:docs command to auto-generate docs-site/changelog.md from root CHANGELOG.md
- Add breaking changes support to the changelog fragment generator
- Fix docs-sync test to only compare current minor release headings
- Apply prettier formatting to source files

src/renderer/modals/subtitle-sidebar.test.ts

@@ -75,7 +75,10 @@ function createListStub() {
 }
 
 test.afterEach(() => {
-  if (Object.prototype.hasOwnProperty.call(globalThis, 'window') && globalThis.window === undefined) {
+  if (
+    Object.prototype.hasOwnProperty.call(globalThis, 'window') &&
+    globalThis.window === undefined
+  ) {
     Reflect.deleteProperty(globalThis, 'window');
   }
   if (