Add brag-sheet as internal Microsoft team plugin

[vidhartbhatia]

Summary

Package the brag-sheet skill as a plugin for internal Microsoft team plugin marketplaces, giving team members one-command install with Microsoft Connect-specific framing built in.

Why

• Every Microsoft engineer does Connect reviews — large internal audience
• Internal plugin marketplaces support one-command install
• Can include Connect-specific framing by default (no need to keep generic)
• Low effort — we already have the SKILL.md

Spec

Plugin structure

plugins/brag-sheet/
├── .claude-plugin/
│   └── plugin.json
├── skills/
│   └── brag-sheet/
│       └── SKILL.md          # Microsoft-preset version with Connect framing
└── README.md

Differences from awesome-copilot skill

• Include Microsoft Connect-specific framing by default
• Reference internal tools (ADO, ICM, Kusto) explicitly
• Can bundle extension install instructions as an asset

Tasks

• Create plugin directory structure
• Adapt SKILL.md with full Microsoft/Connect framing
• Create plugin.json manifest
• Register in marketplace
• Create README.md
• Submit PR and test install

[vidhartbhatia]

Tracking concrete venue candidates internally and will update this issue once a submission lands. Sequenced after PR #33 ships v1.1.0.