feat: Add Line plugin (#1630)

* feat: add LINE plugin (#1630) (thanks @plum-dawg)

* feat: complete LINE plugin (#1630) (thanks @plum-dawg)

* chore: drop line plugin node_modules (#1630) (thanks @plum-dawg)

* test: mock /context report in commands test (#1630) (thanks @plum-dawg)

* test: limit macOS CI workers to avoid OOM (#1630) (thanks @plum-dawg)

* test: reduce macOS CI vitest workers (#1630) (thanks @plum-dawg)

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

extensions/line/index.ts

@@ -0,0 +1,20 @@
+import type { ClawdbotPluginApi } from "clawdbot/plugin-sdk";
+import { emptyPluginConfigSchema } from "clawdbot/plugin-sdk";
+
+import { linePlugin } from "./src/channel.js";
+import { registerLineCardCommand } from "./src/card-command.js";
+import { setLineRuntime } from "./src/runtime.js";
+
+const plugin = {
+  id: "line",
+  name: "LINE",
+  description: "LINE Messaging API channel plugin",
+  configSchema: emptyPluginConfigSchema(),
+  register(api: ClawdbotPluginApi) {
+    setLineRuntime(api.runtime);
+    api.registerChannel({ plugin: linePlugin });
+    registerLineCardCommand(api);
+  },
+};
+
+export default plugin;