Add LINE channel adapter with webhook ingress and gating

src/channels/index.ts

@@ -21,4 +21,5 @@ export { MattermostAdapter, type MattermostAdapterConfig } from './mattermost/in
 export { TeamsAdapter, type TeamsAdapterConfig } from './teams/index.js';
 export { GoogleChatAdapter, type GoogleChatAdapterConfig } from './googleChat/index.js';
 export { BlueBubblesAdapter, type BlueBubblesAdapterConfig } from './bluebubbles/index.js';
+export { LineAdapter, type LineAdapterConfig } from './line/index.js';
 export { PairingManager, type PairingConfig, type PairingStore, type ApprovedSender } from './pairing.js';