feat: implement Jira OAuth integration and connector routes

- Added support for Jira OAuth with new environment variables for client ID, client secret, and redirect URI.
- Implemented Jira connector routes for OAuth flow, including authorization and callback handling.
- Enhanced Jira connector to support both OAuth 2.0 and legacy API token authentication.
- Updated Jira indexing logic to utilize OAuth credentials with auto-refresh capabilities.
- Removed outdated Jira UI components and adjusted frontend logic to reflect the new integration.

surfsense_backend/app/routes/__init__.py

@@ -28,6 +28,7 @@ from .search_source_connectors_routes import router as search_source_connectors_
 from .search_spaces_routes import router as search_spaces_router
 from .slack_add_connector_route import router as slack_add_connector_router
 from .discord_add_connector_route import router as discord_add_connector_router
+from .jira_add_connector_route import router as jira_add_connector_router
 
 router = APIRouter()
 
@@ -48,6 +49,7 @@ router.include_router(luma_add_connector_router)
 router.include_router(notion_add_connector_router)
 router.include_router(slack_add_connector_router)
 router.include_router(discord_add_connector_router)
+router.include_router(jira_add_connector_router)
 router.include_router(new_llm_config_router)  # LLM configs with prompt configuration
 router.include_router(logs_router)
 router.include_router(circleback_webhook_router)  # Circleback meeting webhooks