refactor: reorganize documentation and rules structure (#174)

* refactor(rules): reorganize cursor rules into specialized directories

- move rules into dedicated directories (core-rules, documentation, global-rules, tool-rules, workflows)
- add .cursor/templates directory with standardized templates
- update apply-rules.sh script for new directory structure
- improve rule organization and maintainability
- remove redundant notepad-based workflow

* docs: update README with new instructions

* refactor: remove redundant xnotes

* refactor: merge kubernetes rule with crd rule

* fix: bring back accidentally deleted frontmatter

Author: dgokcin