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.

env.example

@@ -38,10 +38,15 @@ AUTOCOMPLETE_GITHUB_REF=main
 AUTOCOMPLETE_FILENAME=danbooru.csv
 
 SWARMUI_LOCAL_PORT=17801
-# Optional LLM beside SwarmUI: none | ollama | llamacpp (or gpu-rent setup / --ollama)
+# Optional LLM beside SwarmUI: none | ollama | llamacpp (setup / --ollama / --llamacpp)
+# ENABLE_SWARMUI=true
+# WORKLOAD=llm          # llm-only (no SwarmUI); requires LLM_RUNTIME≠none
 LLM_RUNTIME=none
 OLLAMA_LOCAL_PORT=17811
 LLAMACPP_LOCAL_PORT=17812
+# OLLAMA_MODELS_MANIFEST=
+# LLAMACPP_MODELS_MANIFEST=
+# HF_TOKEN=   # optional, gated GGUF on Hugging Face
 # git pull SwarmUI + extensions on each up (default true). CLI: --no-update
 UPDATE_GIT=true