Move package field into metadata map across plugin SKILL.md files

[scottaddie]

Migrate 138 SKILL.md files under .github/plugins/ to use spec-conformant metadata maps per the agentskills.io specification.

Changes

• Move top-level package field into metadata.package (116 SDK skills)
• Add license: MIT to all 138 updated files
• Add metadata.author: Microsoft and metadata.version: "1.0.0" to all 138 updated files
• Leave untouched the 28 azure-skills files that already had the target format

Before / After

SDK skill (before):

---
name: azure-ai-projects-py
description: Build AI applications using...
package: azure-ai-projects
---

SDK skill (after):

---
name: azure-ai-projects-py
description: Build AI applications using...
license: MIT
metadata:
  author: Microsoft
  version: "1.0.0"
  package: azure-ai-projects
---

Utility skill with no package (before):

---
name: fastapi-router-py
description: Create FastAPI routers...
---

Utility skill with no package (after):

---
name: fastapi-router-py
description: Create FastAPI routers...
license: MIT
metadata:
  author: Microsoft
  version: "1.0.0"
---

Scope

Plugin directory	Files updated
azure-sdk-dotnet	29
azure-sdk-java	26
azure-sdk-python	42
azure-sdk-rust	7
azure-sdk-typescript	24
deep-wiki	10
Total	138

All package values (npm scoped names, Maven coordinates, multi-package lists, Rust crate names) are preserved exactly. Multi-line descriptions using block scalars are also preserved.