MaintainerGuard v0.1.4

Maintenance release focused on Marketplace consistency, CI coverage, and documentation navigation.

Changes:

Public GitHub Action examples now consistently use xxxquide/MaintainerGuard@v0.1.4.
Generated mg init --github-action workflow templates now use xxxquide/MaintainerGuard@v0.1.4.
Package metadata and mg version now report 0.1.4.
Repository workflow examples now use current official actions/checkout@v6 and actions/setup-python@v6 major versions.
CI smoke coverage now includes ./mg verify, the secret-finding demo, JSON demo output, and PR analysis with scanner input.
Added docs/README.md and examples/README.md for easier project navigation.

No new runtime dependencies, no auto-merge behavior, no default AI enablement, and no comment publishing by default.

Use:

uses: xxxquide/MaintainerGuard@v0.1.4

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