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/access_card.py

@@ -40,17 +40,19 @@ def resolve_llm_runtime(cfg: Config) -> str:
 
 def collect_access_links(cfg: Config, *, tunneled: bool) -> list[AccessLink]:
     """Build the list of user-facing endpoints (unit-tested)."""
-    port = cfg.swarmui_local_port
-    base = f"http://127.0.0.1:{port}"
     links: list[AccessLink] = []
+    swarm = bool(getattr(cfg, "enable_swarmui", True))
     if tunneled:
-        links.extend(
-            [
-                AccessLink("SwarmUI UI", base, "браузер"),
-                AccessLink("SwarmUI API", f"{base}/API/", "HTTP JSON"),
-                AccessLink("SwarmUI MCP", f"{base}/mcp", "Cursor mcp.json"),
-            ]
-        )
+        if swarm:
+            port = cfg.swarmui_local_port
+            base = f"http://127.0.0.1:{port}"
+            links.extend(
+                [
+                    AccessLink("SwarmUI UI", base, "браузер"),
+                    AccessLink("SwarmUI API", f"{base}/API/", "HTTP JSON"),
+                    AccessLink("SwarmUI MCP", f"{base}/mcp", "Cursor mcp.json"),
+                ]
+            )
         runtime = resolve_llm_runtime(cfg)
         if runtime == "ollama":
             o = cfg.ollama_local_port
@@ -82,6 +84,14 @@ def collect_access_links(cfg: Config, *, tunneled: bool) -> list[AccessLink]:
                     AccessLink("Models", f"http://127.0.0.1:{p}/v1/models", "list"),
                 ]
             )
+        if not links:
+            links.append(
+                AccessLink(
+                    "Туннель",
+                    "gpu-rent tunnel",
+                    "нет сервисов — ENABLE_SWARMUI / LLM_RUNTIME",
+                )
+            )
     else:
         links.append(
             AccessLink(
@@ -94,6 +104,8 @@ def collect_access_links(cfg: Config, *, tunneled: bool) -> list[AccessLink]:
 
 
 def mcp_snippet_lines(cfg: Config) -> list[str]:
+    if not bool(getattr(cfg, "enable_swarmui", True)):
+        return ["# SwarmUI MCP skip (llm-only)"]
     port = cfg.swarmui_local_port
     return [
         "{",