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/remote/bootstrap.sh

@@ -95,7 +95,26 @@ mkdir -p \
   "${DATA_ROOT}/dlbackend" \
   "${DATA_ROOT}/Extensions" \
   "${DATA_ROOT}/DLNodes" \
-  "${DATA_ROOT}/CustomWorkflows"
+  "${DATA_ROOT}/CustomWorkflows" \
+  "${DATA_ROOT}/ollama" \
+  "${DATA_ROOT}/llamacpp/models"
+
+# LLM-only: data disk + tools, no SwarmUI clone / unit.
+if [[ "${GPU_RENT_SKIP_SWARMUI:-0}" == "1" ]]; then
+  chown -R "${SWARM_USER}:${SWARM_USER}" "$DATA_ROOT"
+  date -u +"%Y-%m-%dT%H:%M:%SZ" >"$MARKER_DATA"
+  date -u +"%Y-%m-%dT%H:%M:%SZ" >"${DATA_ROOT}/.gpu-rent-llm-only"
+  chown "${SWARM_USER}:${SWARM_USER}" "$MARKER_DATA" "${DATA_ROOT}/.gpu-rent-llm-only"
+  systemctl stop swarmui 2>/dev/null || true
+  systemctl disable swarmui 2>/dev/null || true
+  if command -v nvidia-smi >/dev/null 2>&1; then
+    nvidia-smi -L || true
+  fi
+  log "bootstrap ok (llm-only; без SwarmUI)"
+  exit 0
+fi
+
+rm -f "${DATA_ROOT}/.gpu-rent-llm-only" 2>/dev/null || true
 
 if [[ ! -d "${SWARM_ROOT}/.git" ]]; then
   log "clone SwarmUI -> ${SWARM_ROOT}"