Create symlink to win .ssh folder

[klemenza]

Add automatic SSH key sharing via symlink

Summary

WSL distros now automatically share Windows SSH keys by symlinking /home/admin/.ssh to the Windows user's .ssh directory (/mnt/c/Users/{username}/.ssh). This enables git operations and Ansible deployments without manual key copying.

Changes

• Windows username detection: Detects Windows username using USERNAME env var.
• Symlink creation: Bootstrap script creates symlink from /home/admin/.ssh → /mnt/c/Users/{username}/.ssh if Windows .ssh directory exists
• Fallback behavior: Creates empty /home/admin/.ssh directory if no Windows .ssh found (for Ansible known_hosts module)

Benefits

• ✅ Zero configuration - SSH keys automatically available in WSL
• ✅ Always in sync - No copying needed, keys stay current
• ✅ Simpler code - One ln -s command vs complex file iteration/copying
• ✅ Works with all key types - id_rsa, id_ed25519, id_ecdsa, etc.

Technical Details

The symlink is created during bootstrap in pkg/wsl/manager.go:

ln -s "/mnt/c/Users/{username}/.ssh" /home/admin/.ssh
chown -h admin:admin /home/admin/.ssh