GitHub MCP Server 0.4.0

@toby

New Tools

Assign GitHub Copilot to issues: meet the new coding agent.
🔔 Tools to list/manage notifications and subscriptions.
Create pending pull request reviews, add review comments, and then submit the review when done!
- This also fixes a bug where some users experiences json schema validation issues with the previous pull request review tool.

fix: update get_me reason arg description by @toby in #403
Alter the description of get-me to reduce redundant repeat calls by @SamMorrowDrums in #411
Split PR review creation, commenting, submission and deletion by @williammartin in #410
feat: add golangci-lint-action to the lint workflow by @radar07 in #407
build(deps): bump github.com/mark3labs/mcp-go from 0.27.0 to 0.28.0 by @dependabot in #412
Support assigning copilot to issues by @williammartin & @martinajir in #418
feat: add GitHub notifications tools for managing user notifications by @sridharavinash in #225

Full Changelog: v0.3.0...v0.4.0