feat: implement OpenClaw integration

Ports the OMX OpenClaw module into oh-my-openagent as a first-class integration.
This integration allows forwarding internal events (session lifecycle, tool execution) to external gateways (HTTP or command-based).

- Added `src/openclaw` directory with implementation:
  - `dispatcher.ts`: Handles HTTP/Command dispatching with interpolation
  - `types.ts`: TypeScript definitions
  - `client.ts`: Main entry point `wakeOpenClaw`
  - `index.ts`: Public API
- Added `src/config/schema/openclaw.ts` for Zod schema validation
- Updated `src/config/schema/oh-my-opencode-config.ts` to include `openclaw` config
- Added `src/hooks/openclaw-sender/index.ts` to listen for events
- Registered the hook in `src/plugin/hooks/create-session-hooks.ts`
- Added unit tests in `src/openclaw/__tests__`

Events handled:
- `session-start` (via `session.created`)
- `session-end` (via `session.deleted`)
- `session-idle` (via `session.idle`)
- `ask-user-question` (via `tool.execute.before` for `ask_user_question`)
- `stop` (via `tool.execute.before` for `stop-continuation` command)

src/openclaw/__tests__/client.test.ts

@@ -0,0 +1,41 @@
+import { describe, it, expect } from "bun:test";
+import { resolveGateway } from "../client";
+import { type OpenClawConfig } from "../types";
+
+describe("OpenClaw Client", () => {
+  describe("resolveGateway", () => {
+    const config: OpenClawConfig = {
+      enabled: true,
+      gateways: {
+        foo: { type: "command", command: "echo foo" },
+        bar: { type: "http", url: "https://example.com" },
+      },
+      hooks: {
+        "session-start": {
+          gateway: "foo",
+          instruction: "start",
+          enabled: true,
+        },
+        "session-end": { gateway: "bar", instruction: "end", enabled: true },
+        stop: { gateway: "foo", instruction: "stop", enabled: false },
+      },
+    };
+
+    it("resolves valid mapping", () => {
+      const result = resolveGateway(config, "session-start");
+      expect(result).not.toBeNull();
+      expect(result?.gatewayName).toBe("foo");
+      expect(result?.instruction).toBe("start");
+    });
+
+    it("returns null for disabled hook", () => {
+      const result = resolveGateway(config, "stop");
+      expect(result).toBeNull();
+    });
+
+    it("returns null for unmapped event", () => {
+      const result = resolveGateway(config, "ask-user-question");
+      expect(result).toBeNull();
+    });
+  });
+});