docs(mcp): document Claude Code native HTTP transport

Configure your MCP client to point at `https://gitlab.com/api/v4/orbit/mcp`.

**Claude Code** supports the Orbit endpoint over the built-in HTTP transport.

Register it with one command:

```shell

claude mcp add --transport http gitlab-orbit https://gitlab.com/api/v4/orbit/mcp

```

The first `query_graph` or `get_graph_schema` call opens your browser to

authenticate with GitLab. No JSON config edit required.

Some clients only support local stdio MCP servers. For those,

[`mcp-remote`](https://www.npmjs.com/package/mcp-remote) wraps the Orbit endpoint

as a local command.

**Claude Code, Cursor, Codex** — add to your agent's MCP config:

**Cursor, Codex, and other JSON-config clients** — add to your agent's MCP config:

```json

{