docs: add docs for docs.ollama.com (#12805)

docs/index.mdx

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+---
+title: Ollama's documentation
+sidebarTitle: Welcome
+---
+
+<img src="/images/welcome.png" noZoom className="rounded-3xl" />
+
+[Ollama](https://ollama.com) is the easiest way to get up and running with large language models such as gpt-oss, Gemma 3, DeepSeek-R1, Qwen3 and more.
+
+<CardGroup cols={2}>
+  <Card title="Quickstart" icon="rocket" href="/quickstart">
+    Get up and running with your first model
+  </Card>
+  <Card
+    title="Download Ollama"
+    icon="download"
+    href="https://ollama.com/download"
+  >
+    Download Ollama on macOS, Windows or Linux
+  </Card>
+  <Card title="Cloud" icon="cloud" href="/cloud">
+    Ollama's cloud models offer larger models with better performance.
+  </Card>
+  <Card title="API reference" icon="terminal" href="/api">
+    View Ollama's API reference
+  </Card>
+</CardGroup>
+
+## Libraries
+
+<CardGroup cols={2}>
+  <Card
+    title="Ollama's Python Library"
+    icon="python"
+    href="https://github.com/ollama/ollama-python"
+  >
+    The official library for using Ollama with Python
+  </Card>
+
+  <Card title="Ollama's JavaScript library" icon="js" href="https://github.com/ollama/ollama-js">
+    The official library for using Ollama with JavaScript or TypeScript.
+  </Card>
+  <Card title="Community libraries" icon="github" href="https://github.com/ollama/ollama?tab=readme-ov-file#libraries-1">
+    View a list of 20+ community-supported libraries for Ollama
+  </Card>
+</CardGroup>
+
+## Community
+
+<CardGroup cols={2}>
+  <Card title="Discord" icon="discord" href="https://discord.gg/ollama">
+    Join our Discord community
+  </Card>
+
+  <Card title="Reddit" icon="reddit" href="https://reddit.com/r/ollama">
+    Join our Reddit community
+  </Card>
+</CardGroup>