fix: correct Nextcloud routing comment, refactor VS Code settings to writable symlink
The Nextcloud service was already routed through the Cloudflare tunnel
but the comment incorrectly said "Tailnet-only". Also moves VS Code
userSettings to an out-of-store symlink so settings.json can be edited
directly in the nix-config repo.
👾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta Code <noreply@letta.com>