Description of Changes

Add support for parsing Proton VPN generated WireGuard config files:

• Extract # Key for <user> as interface name
• Extract first standalone comment after [Peer] as peer name (e.g., NL-FREE#241, AT#133)
• Log unknown comment keys as warnings
• Return errors for unknown attribute keys

Type of Change

• New Feature
• Bug Fix
• Improvement / Refactor

Related Issues / Tickets

tiiuae/wireguard-gui#129

Checklist

• Clear summary in PR description
• Detailed and meaningful commit message(s)
• Commits are logically organized and squashed if appropriate
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• Author has run make-checks and it passes
• All automatic GitHub Action checks pass - see actions
• Author has added reviewers and removed PR draft status

Testing Instructions

Applicable Targets

• Orin AGX aarch64
• Orin NX aarch64
• Lenovo X1 x86_64
• Dell Latitude x86_64
• System 76 x86_64

Installation Method

• Requires full re-installation
• Can be updated with nixos-rebuild ... switch
• Other:

Test Steps To Verify:

1. ...