feat: create autonomous Nivora package repository

Maintain a validated cross-distribution package catalog.
Automate upstream updates, isolated builds, diagnostics, and direct publication.
Build the official GitHub Desktop sources for Linux with working OAuth.

netbird/postinstall.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -euo pipefail
+
+legacy_unit=/etc/systemd/system/netbird.service
+if [[ -f "$legacy_unit" ]] && grep -Fq 'ExecStart=/usr/bin/netbird "service" "run"' "$legacy_unit"; then
+    rm -f -- "$legacy_unit"
+fi
+
+if command -v systemctl >/dev/null 2>&1 && [[ -d /run/systemd/system ]]; then
+    systemctl daemon-reload
+    systemctl enable --now netbird.service
+fi