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.

tests/test_llm_only.py

@@ -0,0 +1,44 @@
+from gpu_rent.config import parse_enable_swarmui
+from gpu_rent.tunnel import tunnel_forwards
+
+
+def test_parse_enable_swarmui_workload(monkeypatch):
+    monkeypatch.delenv("WORKLOAD", raising=False)
+    assert parse_enable_swarmui(None) is True
+    assert parse_enable_swarmui("false") is False
+    monkeypatch.setenv("WORKLOAD", "llm")
+    assert parse_enable_swarmui("true") is False
+    monkeypatch.setenv("WORKLOAD", "both")
+    assert parse_enable_swarmui("false") is True
+
+
+def test_tunnel_forwards_llm_only(monkeypatch):
+    class Cfg:
+        swarmui_local_port = 17801
+        llm_runtime = "llamacpp"
+        enable_swarmui = False
+        ollama_local_port = 17811
+        llamacpp_local_port = 17812
+
+    monkeypatch.setattr("gpu_rent.tunnel.load_state", lambda: type("S", (), {"notes": {}})())
+    assert tunnel_forwards(Cfg()) == [(17812, 8080)]
+
+
+def test_access_links_llm_only(monkeypatch):
+    from gpu_rent.access_card import collect_access_links, mcp_snippet_lines
+
+    class Cfg:
+        swarmui_local_port = 17801
+        llm_runtime = "llamacpp"
+        enable_swarmui = False
+        ollama_local_port = 17811
+        llamacpp_local_port = 17812
+
+    monkeypatch.setattr(
+        "gpu_rent.access_card.load_state",
+        lambda: type("S", (), {"notes": {}})(),
+    )
+    labels = [x.label for x in collect_access_links(Cfg(), tunneled=True)]
+    assert "SwarmUI UI" not in labels
+    assert "llama.cpp" in labels
+    assert mcp_snippet_lines(Cfg())[0].startswith("#")