chore: bump plugin version to 0.4.0 for launcher removal

Major version bump for breaking change: bundled CLI launcher removed.
Users now required to install archcore CLI globally before using plugin.

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

Author: ivklgn

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "archcore",
   "description": "Make your AI agent code with your project's architecture, rules, and decisions.",
-  "version": "0.3.16",
+  "version": "0.4.0",
   "author": {
     "name": "Archcore"
   },

.codex-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "archcore",
   "description": "Make your AI agent code with your project's architecture, rules, and decisions.",
-  "version": "0.3.16",
+  "version": "0.4.0",
   "author": {
     "name": "Archcore"
   },

.cursor-plugin/plugin.json

@@ -2,7 +2,7 @@
   "name": "archcore",
   "displayName": "Archcore",
   "description": "Make your AI agent code with your project's architecture, rules, and decisions.",
-  "version": "0.3.16",
+  "version": "0.4.0",
   "author": {
     "name": "Archcore"
   },