feat: add netbird formula and patched netbird-ui cask

Casks/netbird-ui.rb

@@ -0,0 +1,45 @@
+cask "netbird-ui" do
+  arch arm: "arm64", intel: "amd64"
+
+  version "0.81.3"
+  sha256 arm:   "690a266cfb15367973707f0616f0d1a9691ce026cd346ad4e4225e680e9a99a1",
+         intel: "0ac46b7e2d1d6b0ec987212ed8b3bcde23976f2efb5539ac1ebc0d8052ecee06"
+
+  url "https://github.com/netbirdio/netbird/releases/download/v#{version}/netbird-ui_#{version}_darwin_#{arch}_signed.zip"
+  name "Netbird UI"
+  desc "Desktop client for the NetBird overlay network"
+  homepage "https://www.netbird.io/"
+
+  livecheck do
+    url :url
+    strategy :github_latest
+  end
+
+  depends_on formula: "vokhactri/tap/netbird"
+  depends_on :macos
+
+  app "netbird_ui_darwin", target: "Netbird UI.app"
+
+  # The release zip ships installer.sh as 0644. Upstream chmods it inside the
+  # signed bundle, which can fail with "Operation not permitted". Running it
+  # through /bin/sh needs no chmod.
+  postflight_steps do
+    run "/bin/sh", args: ["{{appdir}}/Netbird UI.app/installer.sh", version], sudo: true
+  end
+
+  # bootout returns before launchd has removed system/netbird. On upgrade the
+  # new installer.sh then fails to load the service and the daemon stays down,
+  # so wait for the old service to go away first.
+  uninstall_preflight_steps do
+    run "/bin/launchctl", args: ["bootout", "system/netbird"],
+        sudo: true, must_succeed: false, print_stderr: false
+    run "/bin/sh",
+        args:         ["-c", "i=0; while /bin/launchctl print system/netbird >/dev/null 2>&1 && [ $i -lt 30 ]; " \
+                             "do sleep 0.5; i=$((i + 1)); done"],
+        sudo:         true,
+        must_succeed: false
+    run "/bin/launchctl", args: ["unload", "/Library/LaunchDaemons/netbird.plist"],
+        sudo: true, must_succeed: false, print_stderr: false
+    remove "/Library/LaunchDaemons/netbird.plist", sudo: true
+  end
+end