v0.1.0

CI/CD

• add workflow scaffold, release automation, and plugin validation by @somaz94

Chore

• reset census to 0.1.0 for the first release by @somaz94

Documentation

• add marketplace and census READMEs, accept --config after subcommand by @somaz94

Features

• add census plugin with config catalog and context-budget report by @somaz94
• add portability skill grading items by machine-specific coupling by @somaz94
• add drift skill with per-directory mirror calibration by @somaz94

Other Changes

• Initial commit by @somaz94