Initial commit: Complete macOS dotfiles system

🖖 Features:
- Master 'engage' script for one-command setup
- 120+ CLI tools via Homebrew
- 40+ Applications (casks + MAS apps)
- Complete macOS system configuration
- Security hardening and privacy settings
- Obsidian knowledge vault setup
- Comprehensive backup strategies
- Automated symlink management

Live long and prosper\! 🚀

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

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

ssh/README.md

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+# SSH Configuration
+
+## ⚠️ Security Notice
+Never commit private keys to git! This directory contains only:
+- Example SSH config (sanitized)
+- Public keys (safe to share)
+- Setup scripts
+
+## Setting up SSH on a new machine
+
+1. **Generate new SSH keys** (if needed):
+```bash
+# GitHub
+ssh-keygen -t ed25519 -C "your_email@example.com" -f ~/.ssh/github
+
+# General purpose
+ssh-keygen -t ed25519 -C "your_email@example.com" -f ~/.ssh/id_ed25519
+```
+
+2. **Restore SSH config**:
+```bash
+cp ~/dotfiles/ssh/config.example ~/.ssh/config
+# Edit ~/.ssh/config to add your actual hostnames, users, and key paths
+```
+
+3. **Set correct permissions**:
+```bash
+chmod 700 ~/.ssh
+chmod 600 ~/.ssh/config
+chmod 600 ~/.ssh/*_key
+chmod 644 ~/.ssh/*.pub
+```
+
+4. **Restore existing keys** (if you have encrypted backups):
+```bash
+# Decrypt backup
+gpg -d ~/dotfiles/backups/ssh_[timestamp].tar.gz.gpg | tar -xzf -
+```
+
+## SSH Config Best Practices
+
+- Use SSH key agent: `ssh-add -K ~/.ssh/your_key`
+- Use different keys for different services
+- Enable 2FA where possible
+- Regularly rotate keys
+
+## Backup Strategy
+
+Run the backup script to create encrypted backups:
+```bash
+~/dotfiles/backup-scripts/backup-sensitive.sh
+```

ssh/config.example

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+# SSH Config Template
+# Copy to ~/.ssh/config and update with your actual values
+
+# Global defaults
+Host *
+  AddKeysToAgent yes
+  UseKeychain yes
+  # Update with your default key
+  IdentityFile ~/.ssh/id_ed25519
+
+# GitHub
+Host github.com
+  HostName github.com
+  User git
+  IdentityFile ~/.ssh/github_key
+  IdentitiesOnly yes
+
+# Example: Personal Server
+# Host myserver
+#   HostName server.example.com
+#   User yourusername
+#   Port 22
+#   IdentityFile ~/.ssh/server_key
+#   IdentitiesOnly yes
+
+# Example: Work Server with Jump Host
+# Host work-server
+#   HostName internal.work.com
+#   User workuser
+#   ProxyJump jumphost.work.com
+#   IdentityFile ~/.ssh/work_key
+#   IdentitiesOnly yes