Merge branch 'ai-agents-documentation' into adp-pkg1

Author: paulohtb6

modules/ai-agents/pages/agents/quickstart.adoc

@@ -55,14 +55,6 @@ The agent orchestrates the `generate_input` and `redpanda_output` tools you crea
 * *Provider*: Select a provider available in your gateway (OpenAI, Anthropic, or Google)
 * *Model*: Choose any balanced model from the dropdown
 
-. Add your API key:
-+
-* Click *Add Secret* under *API Key*
-* Select *Create new secret*
-* *Secret Name*: `<provider>-api-key` (for example, `openai-api-key`)
-* *Secret Value*: Paste your API key
-* Click *Save*
-
 . Write the system prompt:
 +
 [,text]