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/math-intrinsics/sign.js

@@ -0,0 +1,11 @@
+'use strict';
+
+var $isNaN = require('./isNaN');
+
+/** @type {import('./sign')} */
+module.exports = function sign(number) {
+	if ($isNaN(number) || number === 0) {
+		return number;
+	}
+	return number < 0 ? -1 : +1;
+};