docs: documentation overhaul and universal schema reference (#10)

* remove website .astro

* fix default origin

* docs: comprehensive documentation overhaul

- Add quickstart with multi-platform examples (E2B, Daytona, Docker, local)
- Add environment variables setup with platform-specific tabs
- Add Python SDK page (coming soon)
- Add local deployment guide
- Update E2B/Daytona/Docker guides with TypeScript examples
- Configure OpenAPI auto-generation for API reference
- Add CORS configuration guide
- Update manage-sessions with Rivet Actors examples
- Fix SDK method names and URLs throughout
- Add icons to main documentation pages
- Remove outdated universal-api and http-api pages

* docs: add universal schema and agent compatibility docs

- Create universal-schema.mdx with full event/item schema reference
- Create agent-compatibility.mdx mirroring README feature matrix
- Rename glossary.md to universal-schema.mdx
- Update CLAUDE.md with sync requirements for new docs
- Add links in README to building-chat-ui, manage-sessions, universal-schema
- Fix CLI docs link (rivet.dev -> sandboxagent.dev)

* docs: add inspector page and daytona network limits warning

docs/inspector.mdx

@@ -0,0 +1,45 @@
+---
+title: "Inspector"
+description: "Debug and inspect agent sessions with the Inspector UI."
+icon: "magnifying-glass"
+---
+
+The Inspector is a web-based GUI for debugging and inspecting Sandbox Agent sessions. Use it to view events, send messages, and troubleshoot agent behavior in real-time.
+
+<Frame>
+  <img src="/images/inspector.png" alt="Sandbox Agent Inspector" />
+</Frame>
+
+## Open the Inspector
+
+Visit [inspect.sandboxagent.dev](https://inspect.sandboxagent.dev) and enter your server URL and token to connect.
+
+You can also generate a pre-filled Inspector URL from the TypeScript SDK:
+
+```typescript
+import { buildInspectorUrl } from "sandbox-agent";
+
+const url = buildInspectorUrl({
+  baseUrl: "http://127.0.0.1:2468",
+  token: process.env.SANDBOX_TOKEN,
+});
+console.log(url);
+// https://inspect.sandboxagent.dev?url=http%3A%2F%2F127.0.0.1%3A2468&token=...
+```
+
+## Features
+
+- **Session list**: View all active sessions and their status
+- **Event stream**: See events in real-time as they arrive (SSE or polling)
+- **Event details**: Expand any event to see its full JSON payload
+- **Send messages**: Post messages to a session directly from the UI
+- **Agent selection**: Switch between agents and modes
+- **Request log**: View raw HTTP requests and responses for debugging
+
+## When to Use
+
+The Inspector is useful for:
+
+- **Development**: Test your integration without writing client code
+- **Debugging**: Inspect event payloads and timing issues
+- **Learning**: Understand how agents respond to different prompts