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/shared/setup-state.test.ts

@@ -203,13 +203,7 @@ test('resolveDefaultMpvInstallPaths resolves linux, macOS, and Windows defaults'
       'main.lua',
     ),
     pluginDir: path.posix.join(macHomeDir, '.config', 'mpv', 'scripts', 'subminer'),
-    pluginConfigPath: path.posix.join(
-      macHomeDir,
-      '.config',
-      'mpv',
-      'script-opts',
-      'subminer.conf',
-    ),
+    pluginConfigPath: path.posix.join(macHomeDir, '.config', 'mpv', 'script-opts', 'subminer.conf'),
   });
 
   assert.deepEqual(resolveDefaultMpvInstallPaths('win32', 'C:\\Users\\tester', undefined), {