chore: rename package from host-uk/core-agentic to core/php-agentic

Aligns composer package name with forge repo path
(forge.lthn.ai/core/php-agentic).

Co-Authored-By: Virgil <virgil@lethean.io>

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "host-uk/core-agentic",
+    "name": "core/php-agentic",
     "description": "AI agent orchestration and MCP tools for Laravel",
     "keywords": [
         "ai",
@@ -10,7 +10,7 @@
     "license": "EUPL-1.2",
     "require": {
         "php": "^8.2",
-        "host-uk/core": "dev-main"
+        "core/php-framework": "dev-main"
     },
     "require-dev": {
         "laravel/pint": "^1.18",