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/once/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "once",
+  "version": "1.4.0",
+  "description": "Run a function exactly one time",
+  "main": "once.js",
+  "directories": {
+    "test": "test"
+  },
+  "dependencies": {
+    "wrappy": "1"
+  },
+  "devDependencies": {
+    "tap": "^7.0.1"
+  },
+  "scripts": {
+    "test": "tap test/*.js"
+  },
+  "files": [
+    "once.js"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/once"
+  },
+  "keywords": [
+    "once",
+    "function",
+    "one",
+    "single"
+  ],
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "ISC"
+}