Update Ollama configuration and add Open WebUI support

- Fix ollama module by removing invalid meta section
- Update grey-area ollama service configuration:
  - Change host binding to 0.0.0.0 for external access
  - Remove invalid rsyslog configuration
  - Enable firewall access
- Add Open WebUI module with proper configuration:
  - Integrate with Ollama API at localhost:11434
  - Disable authentication for development
  - Open firewall on port 8080
- Successful test build of grey-area configuration

modules/services/ollama.nix

@@ -430,10 +430,4 @@ in {
       "d ${cfg.dataDir}/runners 0755 ${cfg.user} ${cfg.group} -"
     ];
   };
-
-  meta = {
-    maintainers = ["Geir Okkenhaug Jerstad"];
-    description = "NixOS module for Ollama local LLM service";
-    doc = ./ollama.md;
-  };
 }