feat: major dotfiles refactor with documentation and multi-platform improvements

- Add comprehensive CLAUDE.md with chezmoi best practices and AI assistant guidelines
- Restructure TODO.md with prioritized tasks and detailed organization
- Add PowerShell profile template for Windows platform support
- Split git configs into identity-specific templates (ryan/xevion)
- Convert nushell env.nu and gitconfig to templates for cross-platform rendering
- Refactor chezmoi hooks to TypeScript (.init_pre.ts, .update_pre.ts)
- Update .chezmoiignore with better platform-specific file handling
- Remove deprecated shellchecker.sh and tasks.json from VS Code config
- Add mise integration to shell configs (bash, zsh, nushell, PowerShell)
- Clean up commonrc.sh.tmpl WSL-specific code
- Disable Deno in VS Code settings, enable simple dialog mode
- Add nushell extension recommendation to VS Code

This commit establishes better cross-platform support (Windows/WSL/Linux),
improves documentation for future maintenance, and standardizes configuration
management patterns across the repository.

home/.chezmoiignore

@@ -14,21 +14,27 @@ tool-versions
 .asdf/repository/**
 
 {{ if eq .chezmoi.os "windows" }}
+{{/* Ignore Linux/Unix-only files on Windows */}}
 
+# Shell configs (Linux-only)
 .oh-my-zsh
 .scripts
 *.zsh
 .zshrc
 .bashrc
+.profile
+.bash_aliases
 key.txt
 .passwd-s3fs.age
-.profile
 .tmux.conf
-{{/* this may be pretty broad, will need to be adjusted */}}
-.config
+
+# Linux-only config directories
+.config/kitty
 
 {{ else }}
+{{/* Ignore Windows-only files on Linux/macOS */}}
 
-Documents
+# Windows-only
+Documents/PowerShell
 
 {{ end }}