port mintlify to fumadocs

content/snippets/ai-gateway-key.mdx

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+<Note>
+**Public vs. private resources**
+
+Wherever these instructions show `<key>`, what you put there depends on the resource type:
+
+- **Public resource** - reachable from anywhere, so the gateway checks a [virtual API key](/manage/ai/virtual-api-keys). Copy it from the resource URL after login, the Resource Launcher more-info panel, or `https://app.pangolin.net/<org-id>/keys` (use your self-hosted dashboard URL in place of `app.pangolin.net` if you self-host).
+- **Private resource** - only reachable from devices connected to your Pangolin network, so no key is checked. You must have the [Pangolin client](/manage/clients/install-client) installed and connected. Use the literal string `none` as the key.
+
+Don't delete the key field for private resources. Most clients refuse to start without *some* key set, so they need an inert placeholder rather than a missing one.
+</Note>

content/snippets/pangolin-cloud-toc-cta.mdx

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+{/* <div id="pangolin-toc-cta" className="pangolin-toc-cta-source">
+  <Card
+    title="Try free on Pangolin Cloud"
+    icon="cloud"
+    href="https://app.pangolin.net/auth/signup"
+    arrow="true"
+    cta="Sign up free"
+  >
+    Fastest way to get started with Pangolin using the hosted control plane. No credit card required.
+  </Card>
+</div> */}
+<div></div>