Enhance LLM and SwarmUI integration with improved configuration options

- Updated `env.example` and `gpu-rent.vars.example` to include new variables for LLM runtime and SwarmUI options.
- Refactored CLI commands to support interactive selection of LLM runtime and workload type (SwarmUI, LLM, or both).
- Improved access link generation to handle cases where SwarmUI is disabled, providing clearer user feedback.
- Enhanced provisioning logic to conditionally bootstrap SwarmUI based on user configuration, allowing for LLM-only setups.
- Updated documentation across multiple files to reflect changes in LLM integration, CLI usage, and configuration management.

src/gpu_rent/config.py

@@ -31,6 +31,20 @@ def _as_bool(value: str | None, default: bool) -> bool:
     return value.strip().lower() in {"1", "true", "yes", "on"}
 
 
+def parse_enable_swarmui(raw: str | None, *, default: bool = True) -> bool:
+    """ENABLE_SWARMUI / WORKLOAD=llm|swarm|both → whether to install SwarmUI."""
+    wl = (os.environ.get("WORKLOAD") or "").strip().lower()
+    if wl in {"llm", "llm-only", "llm_only", "llama", "ollama-only"}:
+        return False
+    if wl in {"swarm", "swarmui", "ui"}:
+        return True
+    if wl in {"both", "all", "full"}:
+        return True
+    if raw is None or str(raw).strip() == "":
+        return default
+    return _as_bool(str(raw), default)
+
+
 def _as_int(value: str | None, default: int) -> int:
     if value is None or value.strip() == "":
         return default
@@ -84,6 +98,7 @@ class Config:
     update_git: bool
 
     llm_runtime: str
+    enable_swarmui: bool
     ollama_models_manifest: Path
     llamacpp_models_manifest: Path
     ollama_local_port: int
@@ -169,6 +184,8 @@ def load_config(*, require_auth: bool = True) -> Config:
     except ValueError:
         llm_runtime = "none"
 
+    enable_swarmui = parse_enable_swarmui(os.environ.get("ENABLE_SWARMUI"), default=True)
+
     def _dir(env_name: str, folder: str) -> Path:
         raw = (os.environ.get(env_name) or "").strip()
         return Path(raw).expanduser() if raw else (root / folder)
@@ -210,6 +227,7 @@ def load_config(*, require_auth: bool = True) -> Config:
         swarmui_image=(os.environ.get("SWARMUI_IMAGE") or "").strip(),
         update_git=_as_bool(os.environ.get("UPDATE_GIT"), True),
         llm_runtime=llm_runtime,
+        enable_swarmui=enable_swarmui,
         ollama_models_manifest=ollama_manifest,
         llamacpp_models_manifest=llamacpp_manifest,
         ollama_local_port=_as_int(os.environ.get("OLLAMA_LOCAL_PORT"), 17811),