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- Remove outdated universal-api and http-api pages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/sdks/typescript.mdx

@@ -1,6 +1,7 @@
 ---
-title: "TypeScript SDK"
+title: "TypeScript"
 description: "Use the generated client to manage sessions and stream events."
+icon: "js"
 ---
 
 The TypeScript SDK is generated from the OpenAPI spec that ships with the server. It provides a typed
@@ -147,4 +148,4 @@ The SDK exports OpenAPI-derived types for events, items, and capabilities:
 import type { UniversalEvent, UniversalItem, AgentCapabilities } from "sandbox-agent";
 ```
 
-See `docs/universal-api.mdx` for the universal schema fields and semantics.
+See the [API Reference](/api) for schema details.