Refactor LLM configuration to remove llamacpp support

- Removed references to llamacpp from configuration files, scripts, and documentation, streamlining the LLM setup process to focus solely on Ollama.
- Updated environment variables and paths to eliminate llamacpp-related entries, ensuring clarity in the configuration.
- Adjusted CLI commands and help messages to reflect the removal of llamacpp, enhancing user experience and reducing confusion.
- Revised documentation to provide clear guidance on using Ollama exclusively, including updates to setup instructions and runtime options.

docs/extensions.md

@@ -38,7 +38,7 @@ swarmui:
   - url: https://gitea.hsrv.site/mrleo1nid/swarm-assistent.git
     ref: main
     dir: swarm-assistent
-    requires: ollama   # none | ollama | llamacpp | any-llm; default none = always
+    requires: ollama   # none | ollama | any-llm; default none = always
   - url: https://github.com/example/SwarmUI-SomeExt.git
     ref: main
     dir: SomeExt
@@ -51,8 +51,7 @@ comfy:
 | --- | --- |
 | `none` (или поле отсутствует) | всегда |
 | `ollama` | только при `LLM_RUNTIME=ollama` |
-| `llamacpp` | только при `LLM_RUNTIME=llamacpp` |
-| `any-llm` | при `ollama` или `llamacpp` |
+| `any-llm` | при `LLM_RUNTIME=ollama` |
 
 Строки с несовпавшим `requires` пропускаются (лог), остальные ставятся как обычно. В `extensions.example.yaml` по умолчанию — **swarm-assistent** с `requires: ollama` (чат/vision под Krea 2).