feat: add MCPB bundle and fix npm package distribution

Two distribution methods now available:

1. npm (for Claude Code / developers):
   npm install -g vestige-mcp-server
   claude mcp add vestige vestige-mcp -s user

2. MCPB (for Claude Desktop / one-click install):
   Download vestige-1.1.0.mcpb from releases, double-click

Changes:
- Renamed npm package to vestige-mcp-server (vestige-mcp was taken)
- Fixed postinstall to download binaries from GitHub releases
- Added vestige-mcpb package with manifest and build script
- Uploaded .mcpb bundle to v1.1.0 release

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/vestige-mcp-npm/package.json

@@ -1,6 +1,6 @@
 {
-  "name": "@vestige/mcp",
-  "version": "1.1.0",
+  "name": "vestige-mcp-server",
+  "version": "1.0.0",
   "description": "Vestige MCP Server - AI Memory System for Claude and other assistants",
   "bin": {
     "vestige-mcp": "bin/vestige-mcp.js",