Enable npx execution for MCP server

Remove import.meta.url entry point guard that prevented npx from
invoking main(), and bump version to 0.1.7.

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ironclads/incus-mcp",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "description": "MCP server for Incus container management",
   "main": "build/index.js",
   "type": "module",