* Refactor skill packaging and checksum generation process
- Removed .skill package creation from the skill-release workflow and scripts, focusing on checksum generation only.
- Updated README and SKILL.md files to reflect new installation methods using clawhub.
- Simplified the skill checksums generator script to only generate checksums without packaging.
- Adjusted installation instructions across various skills to promote clawhub for easier installation.
- Enhanced error handling and verification steps in the installation scripts for individual files.
* Add ext-docs to .gitignore to exclude documentation files from version control
davida-ps