feat: Initial confluence-mcp server for realtime collaboration

Provides 8 MCP tools for Confluence Cloud:
- confluence_list_spaces, confluence_create_space
- confluence_search, confluence_get_page
- confluence_create_page, confluence_update_page
- confluence_get_comments, confluence_add_comment

Uses Confluence REST API v2 with basic auth.
Registered in Claude Code and mcp-proxy.

Refs: CF-935

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/@hono/node-server/dist/utils/response.mjs

@@ -0,0 +1,10 @@
+// src/utils/response/constants.ts
+var X_ALREADY_SENT = "x-hono-already-sent";
+
+// src/utils/response.ts
+var RESPONSE_ALREADY_SENT = new Response(null, {
+  headers: { [X_ALREADY_SENT]: "true" }
+});
+export {
+  RESPONSE_ALREADY_SENT
+};