feat: add matrix channel plugin

extensions/matrix/index.ts

@@ -0,0 +1,14 @@
+import type { ClawdbotPluginApi } from "../../src/plugins/types.js";
+
+import { matrixPlugin } from "./src/channel.js";
+
+const plugin = {
+  id: "matrix",
+  name: "Matrix",
+  description: "Matrix channel plugin (matrix-js-sdk)",
+  register(api: ClawdbotPluginApi) {
+    api.registerChannel({ plugin: matrixPlugin });
+  },
+};
+
+export default plugin;