🤖 Feishu: expand channel support

What:
- add post parsing, doc link extraction, routing, replies, reactions, typing, and user lookup
- fix media download/send flows and make doc fetches domain-aware
- update Feishu docs and clawtributor credits

Why:
- raise Feishu parity with other channels and avoid dropped group messages
- keep replies threaded while supporting Lark domains
- document new configuration and credit the contributor

Tests:
- pnpm build
- pnpm check
- pnpm test (gateway suite timed out; reran pnpm vitest run --config vitest.gateway.config.ts)

Co-authored-by: 九灵云 <server@jiulingyun.cn>

extensions/feishu/src/channel.ts

@@ -55,10 +55,10 @@ export const feishuPlugin: ChannelPlugin<ResolvedFeishuAccount> = {
   capabilities: {
     chatTypes: ["direct", "group"],
     media: true,
-    reactions: false,
+    reactions: true,
     threads: false,
     polls: false,
-    nativeCommands: false,
+    nativeCommands: true,
     blockStreaming: true,
   },
   reload: { configPrefixes: ["channels.feishu"] },