feat: add Tavily as a bundled web search plugin with search and extract tools (#49200)

Merged via squash.

Prepared head SHA: ece9226e88
Co-authored-by: lakshyaag-tavily <266572148+lakshyaag-tavily@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

docs/reference/secretref-credential-surface.md

@@ -38,6 +38,7 @@ Scope intent:
 - `plugins.entries.moonshot.config.webSearch.apiKey`
 - `plugins.entries.perplexity.config.webSearch.apiKey`
 - `plugins.entries.firecrawl.config.webSearch.apiKey`
+- `plugins.entries.tavily.config.webSearch.apiKey`
 - `tools.web.search.apiKey`
 - `tools.web.search.gemini.apiKey`
 - `tools.web.search.grok.apiKey`

docs/reference/secretref-user-supplied-credentials-matrix.json

@@ -551,6 +551,13 @@
       "path": "tools.web.search.perplexity.apiKey",
       "secretShape": "secret_input",
       "optIn": true
+    },
+    {
+      "id": "plugins.entries.tavily.config.webSearch.apiKey",
+      "configFile": "openclaw.json",
+      "path": "plugins.entries.tavily.config.webSearch.apiKey",
+      "secretShape": "secret_input",
+      "optIn": true
     }
   ]
 }