AI provider management

* OpenAI-compatible provider adapter
* OpenAI support
* LM Studio support
* Ollama OpenAI-compatible support
* Encrypted API-key storage
* Default provider and model selection
* Provider connection testing
* Reusable prompt library
* Prompt variables and templates
* Prompt version field
* AI execution history
* Token-usage storage
* Duration and failure tracking
* Manual knowledge sources
* Knowledge-source chunking
* Knowledge indexing status
* Authenticated AI REST endpoint
* AI administration dashboard
* AI permissions
* Module registration and boot test

Modules/AI/module.json

@@ -0,0 +1 @@
+{"name":"AI","alias":"ai","version":"1.0.0","description":"Provider-neutral artificial intelligence services, reusable prompts, execution history and knowledge sources.","keywords":["ai","llm","prompts","knowledge","rag"],"priority":140,"providers":["Modules\\AI\\Providers\\AIServiceProvider"],"aliases":{},"files":[],"requires":["Core","Administration","Users","Roles","Audit","Media","Documents","Automation"]}