feat(omo-claude): re-vendor MCP servers self-contained with CLAUDE_PLUGIN_ROOT

ast_grep + lsp servers vendored under plugin/mcp via sync-mcp.mjs; .mcp.json uses
${CLAUDE_PLUGIN_ROOT} (no ../). Both boot from a node_modules-free tree (verified
JSON-RPC initialize handshakes). lsp hook bundled to inline lsp-tools-mcp. mcp/
dist is gitignored (regenerated by build).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -50,3 +50,6 @@ oauth-success.html
 .debug-journal*.md
 session-ses_*.md
 plans/
+
+# omo-claude vendored MCP dist (regenerated by `npm run sync:mcp`)
+packages/omo-claude/plugin/mcp/