docs: refactor README into a docs-first landing page

docs/README.md

@@ -0,0 +1,30 @@
+# nanobot Docs
+
+For the latest documentation, visit [nanobot.wiki](https://nanobot.wiki/docs/0.1.5/getting-started/nanobot-overview).
+
+The pages in this directory track the current repository and may move faster than the published website.
+
+## Core Docs
+
+| Topic | Repo docs |
+|---|---|
+| Install and quick start | [`quick-start.md`](./quick-start.md) |
+| Chat apps | [`chat-apps.md`](./chat-apps.md) |
+| Agent social network | [`agent-social-network.md`](./agent-social-network.md) |
+| Configuration | [`configuration.md`](./configuration.md) |
+| Multiple instances | [`multiple-instances.md`](./multiple-instances.md) |
+| CLI reference | [`cli-reference.md`](./cli-reference.md) |
+| In-chat commands | [`chat-commands.md`](./chat-commands.md) |
+| OpenAI-compatible API | [`openai-api.md`](./openai-api.md) |
+| Deployment | [`deployment.md`](./deployment.md) |
+
+## Advanced Docs
+
+| Topic | Repo docs |
+|---|---|
+| Memory | [`memory.md`](./memory.md) |
+| Python SDK | [`python-sdk.md`](./python-sdk.md) |
+| Channel plugin guide | [`channel-plugin-guide.md`](./channel-plugin-guide.md) |
+| WebSocket channel | [`websocket.md`](./websocket.md) |
+| Custom tools | [`my-tool.md`](./my-tool.md) |
+