Add slash command installation flow

[ivangrynenko]

Summary

• bundle curated Cursor slash commands with the installer and expose --commands / --skip-commands CLI controls plus interactive prompts for home/project/both targets
• sync installer file maps, version metadata, changelog, and guidance docs for the new release (v1.0.8)
• expand test suite and helper scripts to validate command installation scenarios and ensure local bundles are used during test runs

Testing

• .tests/run-tests.sh
• .tests/run-all-tests.sh

[gemini-code-assist]

Summary of Changes

Hello @ivangrynenko, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the Cursor rules installer by integrating the capability to install a comprehensive set of Cursor slash commands. This feature streamlines developer workflows by providing pre-configured prompts for common tasks, improving efficiency and consistency. The changes include updates to the core installer logic, new command-line options, and a thorough refresh of associated documentation and test coverage to ensure robust functionality.

Highlights

• Slash Command Installation: Introduced a new feature allowing the installation of Cursor slash commands, providing ready-to-use prompts for the Cursor agent. Users can choose to install commands to their project directory, user home directory, or both, with interactive and non-interactive options.
• Installer Options and Logic: Added new command-line options --commands and --skip-commands to control slash command installation. The installer now includes logic to detect command source directories (local, environment variable, or GitHub download) and handles recursive copying to the chosen destinations.
• New Slash Commands: A suite of new slash commands has been added, covering various development tasks such as Behat DrevOps, Drupal linting, GitHub issue management, NPM audit fixes, PR assessment and resolution, security scanning, session summaries, and Speckit specification workflows.
• Testing and Documentation Updates: Expanded the automated test suite to validate the new command installation options and their behavior across different targets. Project documentation, including AGENTS.md and CHANGELOG.md, has been updated to reflect these changes, and obsolete specification documents (docs/prd.md, docs/srs.md) have been removed.

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[gemini-code-assist]

Code Review

This pull request introduces a significant new feature: the ability to install curated Cursor slash commands. It adds new CLI options (--commands, --skip-commands) and interactive prompts to the installer, allowing users to install commands to their project, home directory, or both. The changes are well-supported by an expanded test suite that validates the new installation scenarios, including a clever way to test interactive prompts. Documentation has also been updated accordingly, with a new CHANGELOG.md and a more concise spec file. The implementation is robust, handling local command sources for testing and falling back to downloading from GitHub. I've found a few minor issues in the newly added command instruction files, such as a hardcoded local path and a potential typo, which I've commented on.