Remove references to non-existent resource files (references/, assets/,
scripts/, examples/) from 115 skill SKILL.md files. These sections
pointed to directories and files that were never created, causing
confusion when users install skills.
Also fix broken Code of Conduct links in issue templates to use
absolute GitHub URLs instead of relative paths that 404.
* Add extra python skills covering code style, design patterns, resilience, resource management, testing patterns, and type safety ...etc
* fix: correct code examples in Python skills
- Clarify Python version requirements for type statement (3.10+ vs 3.12+)
- Add missing ValidationError import in configuration example
- Add missing httpx import and url parameter in async example
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Co-authored-by: Seth Hobson <wshobson@gmail.com>