Add comprehensive .gitignore for dotfiles repository

- Protect sensitive information (SSH keys, API tokens, credentials)
- Exclude machine-specific files (logs, profiles, backups)
- Filter system artifacts (OS files, editor temps, package caches)
- Maintain clean repository while preserving templates and docs

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,261 @@
+# Dotfiles Repository .gitignore
+
+# ========================================
+# Sensitive Information
+# ========================================
+
+# SSH keys and certificates
+*.pem
+*.key
+*.crt
+*.p12
+*.pfx
+id_rsa*
+id_ed25519*
+known_hosts*
+
+# API keys and tokens
+.env
+.env.*
+*.token
+*.api_key
+auth.json
+credentials.*
+
+# Personal configuration overrides
+local.conf
+personal.conf
+.personal/
+
+# ========================================
+# Machine-Specific Files
+# ========================================
+
+# Current machine profile (generated)
+.machine_profile
+.current_profile
+
+# Installation/sync logs
+*.log
+.package.log
+.profile.log
+.sync.log
+.install.log
+
+# Backup directories (created during installation)
+*_backup_*/
+backups/
+.backup/
+
+# Cache and temporary files
+.cache/
+.tmp/
+*.tmp
+*.temp
+.DS_Store
+Thumbs.db
+
+# ========================================
+# System-Specific Files
+# ========================================
+
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+._*
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+
+# Linux
+.directory
+.Trash-*/
+
+# ========================================
+# Editor and IDE Files
+# ========================================
+
+# Vim
+*.swp
+*.swo
+*~
+.netrwhist
+
+# VS Code
+.vscode/
+*.code-workspace
+
+# Sublime Text
+*.sublime-project
+*.sublime-workspace
+
+# JetBrains IDEs
+.idea/
+*.iml
+
+# Emacs
+*~
+\#*\#
+/.emacs.desktop
+/.emacs.desktop.lock
+*.elc
+auto-save-list
+tramp
+.\#*
+
+# ========================================
+# Package Manager Files
+# ========================================
+
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.npm
+.yarn/
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+.Python
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Ruby
+.bundle/
+vendor/bundle/
+*.gem
+
+# ========================================
+# Runtime and State Files
+# ========================================
+
+# Process IDs
+*.pid
+
+# Lock files
+*.lock
+.lock
+
+# Session files
+.session
+*.session
+
+# History files (may contain sensitive commands)
+*_history
+.bash_history
+.zsh_history
+.python_history
+.mysql_history
+.psql_history
+
+# ========================================
+# Application-Specific
+# ========================================
+
+# Git (if nested repos exist)
+.git/
+*.orig
+
+# Docker
+.dockerignore
+docker-compose.override.yml
+
+# Terraform
+*.tfstate
+*.tfstate.*
+.terraform/
+terraform.tfvars
+
+# AWS
+.aws/credentials
+.aws/config
+
+# GPG
+*.gpg
+*.asc
+.gnupg/
+
+# ========================================
+# Custom Dotfiles Ignores
+# ========================================
+
+# User customizations that shouldn't be shared
+custom/
+local/
+private/
+
+# Machine-specific package lists
+packages.local.yaml
+profiles.local.yaml
+
+# Test files
+test_*
+*_test
+*.test
+
+# Experimental configurations
+experimental/
+draft/
+wip/
+
+# Documentation builds
+_build/
+_site/
+.jekyll-cache/
+
+# ========================================
+# Archive and Compressed Files
+# ========================================
+
+*.7z
+*.dmg
+*.gz
+*.iso
+*.jar
+*.rar
+*.tar
+*.zip
+*.bz2
+*.xz
+
+# ========================================
+# Ignore patterns for specific tools
+# ========================================
+
+# Oh My Zsh custom plugins/themes (if not maintained here)
+zsh/oh-my-zsh/custom/*
+!zsh/oh-my-zsh/custom/.gitkeep
+
+# Vim plugins managed by package managers
+vim/bundle/
+vim/pack/
+vim/.netrwhist
+
+# Homebrew
+Brewfile.lock.json
+
+# ========================================
+# Allow these files (override above patterns)
+# ========================================
+
+# Allow example/template files
+!*.example
+!*.template
+!*.sample
+
+# Allow documentation
+!README.*
+!CHANGELOG.*
+!LICENSE*
+!CONTRIBUTING.*
+
+# Allow configuration templates
+!config.template.*
+!.gitconfig.template