Support Sentry cloud connector in Claude Code web IDE

Problem

The Sentry MCP integration doesn't work in the Claude Code web IDE due to environment constraints:

1. stdio transport (npx @sentry/mcp-server with SENTRY_ACCESS_TOKEN) fails because the cloud sandbox cannot spawn npx processes or download npm packages
2. Remote HTTP transport (https://mcp.sentry.dev/mcp) requires an OAuth browser flow, which isn't possible in the web IDE
3. Sentry cloud connector (available in regular Claude.ai chat) is not available in the Claude Code web IDE

This means there is no way to use Sentry MCP in the web IDE.

Proposed Solution

Extend the Sentry cloud connector (already working in Claude.ai chat) to also be available in the Claude Code web IDE.

Current Workaround

Use Sentry MCP only in the local CLI version of Claude Code, where stdio transport works fine.