continue feat(klavis ai): Add Klavis AI's Strata to MCP Cookbook

Description

Adds Klavis Strata with Continue to automate Gmail and Slack workflow in docs/guides/klavis-mcp-continue-cookbook.mdx

AI Code Review

Team members only: AI review runs automatically when PR is opened or marked ready for review
Team members can also trigger a review by commenting @continue-review

Checklist

[x] I've read the contributing guide
[x] The relevant docs, if any, have been updated or created

Screen recording or screenshot

Link: https://drive.google.com/file/d/1eoAO8GvBWtolfTzuUrXeNtq14zh77ThH/view?usp=sharing Tested with Mintlify and Claude

Tests

Summary by cubic

Adds a new Klavis AI Strata MCP cookbook to help users automate Slack and Gmail workflows with Continue. Updates docs navigation and Guides overview to surface the guide.

New Features
- Added docs/guides/klavis-mcp-continue-cookbook.mdx with setup steps, example prompts, cross-platform workflows, and troubleshooting.
- Updated docs/docs.json to list the cookbook under Cookbooks.
- Updated docs/guides/overview.mdx to include a card linking to the new guide.

^{Written for commit 4cd3bb04b4930e26278b908e7619dd8e009ac93f. Summary will update automatically on new commits.}