Update LLM support for llama.cpp and enhance configuration management

- Added support for `llamacpp-models.yaml` in `.gitignore` and implemented logic to copy it in `gpu-rent.ps1` and `gpu-rent.sh`.
- Enhanced CLI to prompt for llama.cpp model presets during setup and execution, improving user experience.
- Updated configuration handling to include `llamacpp_models_manifest` and related functions for managing llama.cpp models.
- Improved documentation in `cli.md` and `llm.md` to reflect changes in llama.cpp integration and model management.
- Refactored provisioning logic to handle llama.cpp model downloads and configurations effectively.

src/gpu_rent/config.py

@@ -14,6 +14,7 @@ from gpu_rent.paths import (
     default_ssh_key_path,
     env_path,
     extensions_manifest_path,
+    llamacpp_models_manifest_path,
     migrate_legacy_if_needed,
     models_manifest_path,
     ollama_models_manifest_path,
@@ -84,6 +85,7 @@ class Config:
 
     llm_runtime: str
     ollama_models_manifest: Path
+    llamacpp_models_manifest: Path
     ollama_local_port: int
     llamacpp_local_port: int
 
@@ -157,6 +159,10 @@ def load_config(*, require_auth: bool = True) -> Config:
         (os.environ.get("OLLAMA_MODELS_MANIFEST") or "").strip()
         or str(ollama_models_manifest_path())
     ).expanduser()
+    llamacpp_manifest = Path(
+        (os.environ.get("LLAMACPP_MODELS_MANIFEST") or "").strip()
+        or str(llamacpp_models_manifest_path())
+    ).expanduser()
 
     try:
         llm_runtime = normalize_runtime(os.environ.get("LLM_RUNTIME"))
@@ -205,6 +211,7 @@ def load_config(*, require_auth: bool = True) -> Config:
         update_git=_as_bool(os.environ.get("UPDATE_GIT"), True),
         llm_runtime=llm_runtime,
         ollama_models_manifest=ollama_manifest,
+        llamacpp_models_manifest=llamacpp_manifest,
         ollama_local_port=_as_int(os.environ.get("OLLAMA_LOCAL_PORT"), 17811),
         llamacpp_local_port=_as_int(os.environ.get("LLAMACPP_LOCAL_PORT"), 17812),
         default_flavor_id=(os.environ.get("DEFAULT_FLAVOR_ID") or "").strip(),