feat(feishu): replace built-in SDK with community plugin

Replace the built-in Feishu SDK with the community-maintained
clawdbot-feishu plugin by @m1heng.

Changes:
- Remove src/feishu/ directory (19 files)
- Remove src/channels/plugins/outbound/feishu.ts
- Remove src/channels/plugins/normalize/feishu.ts
- Remove src/config/types.feishu.ts
- Remove feishu exports from plugin-sdk/index.ts
- Remove FeishuConfig from types.channels.ts

New features in community plugin:
- Document tools (read/create/edit Feishu docs)
- Wiki tools (navigate/manage knowledge base)
- Drive tools (folder/file management)
- Bitable tools (read/write table records)
- Permission tools (collaborator management)
- Emoji reactions support
- Typing indicators
- Rich media support (bidirectional image/file transfer)
- @mention handling
- Skills for feishu-doc, feishu-wiki, feishu-drive, feishu-perm

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

extensions/feishu/src/outbound.ts

@@ -0,0 +1,40 @@
+import type { ChannelOutboundAdapter } from "openclaw/plugin-sdk";
+import { sendMediaFeishu } from "./media.js";
+import { getFeishuRuntime } from "./runtime.js";
+import { sendMessageFeishu } from "./send.js";
+
+export const feishuOutbound: ChannelOutboundAdapter = {
+  deliveryMode: "direct",
+  chunker: (text, limit) => getFeishuRuntime().channel.text.chunkMarkdownText(text, limit),
+  chunkerMode: "markdown",
+  textChunkLimit: 4000,
+  sendText: async ({ cfg, to, text }) => {
+    const result = await sendMessageFeishu({ cfg, to, text });
+    return { channel: "feishu", ...result };
+  },
+  sendMedia: async ({ cfg, to, text, mediaUrl }) => {
+    // Send text first if provided
+    if (text?.trim()) {
+      await sendMessageFeishu({ cfg, to, text });
+    }
+
+    // Upload and send media if URL provided
+    if (mediaUrl) {
+      try {
+        const result = await sendMediaFeishu({ cfg, to, mediaUrl });
+        return { channel: "feishu", ...result };
+      } catch (err) {
+        // Log the error for debugging
+        console.error(`[feishu] sendMediaFeishu failed:`, err);
+        // Fallback to URL link if upload fails
+        const fallbackText = `📎 ${mediaUrl}`;
+        const result = await sendMessageFeishu({ cfg, to, text: fallbackText });
+        return { channel: "feishu", ...result };
+      }
+    }
+
+    // No media URL, just return text result
+    const result = await sendMessageFeishu({ cfg, to, text: text ?? "" });
+    return { channel: "feishu", ...result };
+  },
+};