add SearXNG safe-search script and improve OWUI search env vars

- New configure-searxng-safesearch.sh: set strict/moderate/none level,
  disable engines that can't enforce the chosen level (torrent sites,
  mojeek, baidu, yandex, nvidious/piped/peertube video frontends),
  updates &safesearch= in SEARXNG_QUERY_URL, and restarts searxng
- Add RAG_WEB_SEARCH_RESULT_COUNT=5 and RAG_WEB_SEARCH_CONCURRENT_REQUESTS=10
  to Open WebUI env in both setup scripts
- Add &safesearch=0 to SEARXNG_QUERY_URL so the script can find/replace it
- Sync ENABLE_TOOL_SERVERS=true into laptop_full_setup.sh (was missing)

https://claude.ai/code/session_012gDnantBmFTWZGCiKyjazx

laptop_full_setup.sh

@@ -780,7 +780,10 @@ ${OLLAMA_VOLUME_LINE}
       - ENABLE_OPENAI_API=true
       - ENABLE_RAG_WEB_SEARCH=true
       - RAG_WEB_SEARCH_ENGINE=searxng
-      - SEARXNG_QUERY_URL=http://searxng:8080/search?q=<query>&format=json
+      - SEARXNG_QUERY_URL=http://searxng:8080/search?q=<query>&format=json&safesearch=0
+      - RAG_WEB_SEARCH_RESULT_COUNT=5
+      - RAG_WEB_SEARCH_CONCURRENT_REQUESTS=10
+      - ENABLE_TOOL_SERVERS=true
       - WEBUI_AUTH=true
       - WEBUI_URL=${WEBUI_URL:-}
     depends_on: