feat: add --agent-skills switch to init command

[dhilipkumars]

This change adds the --agent-skills switch to the init command, allowing users to automatically install agent skills from Prompt.MD templates. It also adds pyyaml as a dependency.

Note: Build this with the help of Google Antigravity tool but tested manually on sample projects.

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[Copilot]

Pull request overview

This PR adds support for automatically installing agent skills during project initialization by introducing the --agent-skills flag to the init command. The feature converts Prompt.MD template files from templates/commands/ into properly formatted SKILL.md files following the agentskills.io specification.

Changes:

• Added install_agent_skills() function to convert Prompt.MD templates into agent skills with enhanced descriptions
• Added --agent-skills CLI flag to init command (requires --ai flag)
• Added pyyaml dependency for YAML frontmatter parsing

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/specify_cli/init.py	Implements agent skills installation logic and adds CLI flag validation
pyproject.toml	Adds pyyaml dependency and bumps version to 0.0.23
README.md	Documents the new --agent-skills flag with usage examples
CHANGELOG.md	Documents the feature addition for version 0.0.23

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[Copilot]

The error message references command_name which may not be defined if the exception occurs before line 1008. Consider using command_file.stem or wrapping in a try-except to ensure the variable is always available.

Suggested change

	console.print(f"[yellow]Warning: Failed to install skill {command_name}: {e}[/yellow]")
	skill_label = command_name if 'command_name' in locals() else command_file.stem
	console.print(f"[yellow]Warning: Failed to install skill {skill_label}: {e}[/yellow]")

[Copilot]

Inconsistent naming: the directory is referred to as .specify/ here but the actual skills are installed to .agent/ directory. This should be clarified or corrected to avoid confusion.

Suggested change

	compatibility: Requires git and spec-kit project structure with .specify/ directory
	compatibility: Requires git and spec-kit project structure with .agent/skills/ directory