🔍 feat: Add SearXNG for Web Search and Enhance ApiKeyDialog (#8242)

* 🔍 feat: Add SearXNG Web Search support and enhance ApiKeyDialog

- Updated WebSearch component to include authentication data for web search functionality so it won't show badge after being revoked
- Refactored ApiKeyDialog to streamline provider, scraper, and reranker selection with new InputSection component
- Added support for SearXNG as a search provider and updated translation files accordingly
- Improved form handling in useAuthSearchTool to accommodate new API keys and URLs

* 📜 chore: remove unused i18next key

* 📦 chore: address comments (swap API key and URL fields in SearXNG config, change input fields to 'text' from 'password'

* 📦 chore: make URL fields go first in ApiKeyDialog

* chore: bump @librechat/agents to v2.4.52

* ci: update webSearch configuration to include searxng fields in AppService.spec.js

---------

Co-authored-by: Danny Avila <danny@librechat.ai>

api/server/services/AppService.spec.js

@@ -152,12 +152,14 @@ describe('AppService', () => {
       filteredTools: undefined,
       includedTools: undefined,
       webSearch: {
+        safeSearch: 1,
+        jinaApiKey: '${JINA_API_KEY}',
         cohereApiKey: '${COHERE_API_KEY}',
+        serperApiKey: '${SERPER_API_KEY}',
+        searxngApiKey: '${SEARXNG_API_KEY}',
         firecrawlApiKey: '${FIRECRAWL_API_KEY}',
         firecrawlApiUrl: '${FIRECRAWL_API_URL}',
-        jinaApiKey: '${JINA_API_KEY}',
-        safeSearch: 1,
-        serperApiKey: '${SERPER_API_KEY}',
+        searxngInstanceUrl: '${SEARXNG_INSTANCE_URL}',
       },
       memory: undefined,
       agents: {