feat: add netbird formula and patched netbird-ui cask

.github/workflows/bump.yml

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+name: Bump netbird
+
+on:
+  schedule:
+    - cron: "17 */2 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  bump:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Update cask to the latest release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          set -euo pipefail
+          cask=Casks/netbird-ui.rb
+          latest=$(gh api repos/netbirdio/netbird/releases/latest --jq .tag_name)
+          latest=${latest#v}
+          current=$(sed -nE 's/^  version "([^"]+)"$/\1/p' "$cask")
+          if [ "$latest" = "$current" ]; then
+            echo "Already at $current"
+            exit 0
+          fi
+
+          base="https://github.com/netbirdio/netbird/releases/download/v$latest"
+          declare -A sha
+          for asset in netbird-ui_${latest}_darwin_{arm64,amd64}_signed.zip netbird_${latest}_darwin_{arm64,amd64}.tar.gz; do
+            # Release assets can show up a while after the tag. Try again on the next run.
+            if ! curl -fsSL -o asset "$base/$asset"; then
+              echo "$asset is not published yet"
+              exit 0
+            fi
+            sha[$asset]=$(sha256sum asset | cut -d' ' -f1)
+            rm -f asset
+          done
+
+          sed -i -E \
+            -e "s/^  version \"[^\"]+\"$/  version \"$latest\"/" \
+            -e "s/(arm: +\")[0-9a-f]{64}/\1${sha[netbird-ui_${latest}_darwin_arm64_signed.zip]}/" \
+            -e "s/(intel: \")[0-9a-f]{64}/\1${sha[netbird-ui_${latest}_darwin_amd64_signed.zip]}/" \
+            "$cask"
+
+          # The formula has literal URLs, each followed by its sha256 line.
+          formula=Formula/netbird.rb
+          sed -i -E "s/${current//./\\.}/$latest/g" "$formula"
+          for arch in arm64 amd64; do
+            asset="netbird_${latest}_darwin_${arch}.tar.gz"
+            sed -i -E "/\/${asset//./\\.}\"/{n;s/[0-9a-f]{64}/${sha[$asset]}/}" "$formula"
+          done
+          git diff
+
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git commit -am "chore: bump netbird to $latest"
+          git push

Casks/netbird-ui.rb

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+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

Formula/netbird.rb

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+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

README.md

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+# vokhactri/homebrew-tap
+
+My personal Homebrew tap for macOS.
+
+| Package | Type | Description |
+| --- | --- | --- |
+| [`netbird`](https://github.com/netbirdio/netbird) | formula | NetBird CLI and daemon |
+| [`netbird-ui`](https://github.com/netbirdio/netbird) | cask | NetBird menu bar app |
+
+## Install
+
+```sh
+brew tap vokhactri/tap
+brew trust vokhactri/tap
+brew install vokhactri/tap/<name>
+```
+
+Use `brew install --cask` for casks.
+
+## Updates
+
+A GitHub Action checks for new upstream releases every two hours and commits the new version
+and sha256 values. If a release doesn't have its macOS files yet, the Action tries again on the
+next run.