feat: add netbird formula and patched netbird-ui cask

Formula/netbird.rb

@@ -0,0 +1,28 @@
+class Netbird < Formula
+  desc "Connect devices into a WireGuard-based overlay network"
+  homepage "https://netbird.io/"
+  license "BSD-3-Clause"
+
+  if Hardware::CPU.arm?
+    url "https://github.com/netbirdio/netbird/releases/download/v0.81.3/netbird_0.81.3_darwin_arm64.tar.gz"
+    sha256 "bc37108ee88cbc0a998031231570a2c62f03c0937867a0114b8d137e7840fe71"
+  else
+    url "https://github.com/netbirdio/netbird/releases/download/v0.81.3/netbird_0.81.3_darwin_amd64.tar.gz"
+    sha256 "95ef6a3f3c56d7d7d96e66fdf2523a6ee8c719b8beb959e9f15c6a101e4cac1f"
+  end
+
+  livecheck do
+    url "https://github.com/netbirdio/netbird"
+    strategy :github_latest
+  end
+
+  depends_on :macos
+
+  def install
+    bin.install "netbird"
+  end
+
+  test do
+    assert_match version.to_s, shell_output("#{bin}/netbird version")
+  end
+end