feat: sensitive channel (#11438)

* feat(backend): add isSensitive to Channel

* feat(backend): support isSensitive in channel endpoints

* feat(frontend/channel-editor): support isSensitive in create/edit channel page

* feat(frontend/channel): show sensitive indicator for sensitive channels

* docs(changelog): add チャンネルをセンシティブ指定できるようになりました

* chore: license header for each file

* chore: add isSensitive of channel to Note object

packages/backend/src/core/entities/NoteEntityService.ts

@@ -333,6 +333,7 @@ export class NoteEntityService implements OnModuleInit {
 				id: channel.id,
 				name: channel.name,
 				color: channel.color,
+				isSensitive: channel.isSensitive,
 			} : undefined,
 			mentions: note.mentions.length > 0 ? note.mentions : undefined,
 			uri: note.uri ?? undefined,