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/tools-config.ts

@@ -0,0 +1,21 @@
+import type { FeishuToolsConfig } from "./types.js";
+
+/**
+ * Default tool configuration.
+ * - doc, wiki, drive, scopes: enabled by default
+ * - perm: disabled by default (sensitive operation)
+ */
+export const DEFAULT_TOOLS_CONFIG: Required<FeishuToolsConfig> = {
+  doc: true,
+  wiki: true,
+  drive: true,
+  perm: false,
+  scopes: true,
+};
+
+/**
+ * Resolve tools config with defaults.
+ */
+export function resolveToolsConfig(cfg?: FeishuToolsConfig): Required<FeishuToolsConfig> {
+  return { ...DEFAULT_TOOLS_CONFIG, ...cfg };
+}