Add webdrop-bridge cask and update README with usage instructions

Casks/webdrop-bridge.rb

@@ -0,0 +1,36 @@
+cask "webdrop-bridge" do
+  version "0.9.1"
+  sha256 "61bf36f51d2fc485c15e0f1b8885241b83220a9dcec7966fb848409f266299ac"
+
+  url "https://git.him-tools.de/HIM-public/webdrop-bridge/releases/download/v#{version}/WebDropBridge-#{version}-macos-universal.dmg"
+  name "WebDrop Bridge"
+  desc "Intelligent drag-and-drop file bridge for web to desktop applications"
+  homepage "https://git.him-tools.de/HIM-public/webdrop-bridge"
+
+  livecheck do
+    url "https://git.him-tools.de/api/v1/repos/HIM-public/webdrop-bridge/releases/latest"
+    strategy :json do |json|
+      json["tag_name"]&.strip&.sub(/^v/, "")
+    end
+  end
+
+  app "WebDropBridge.app"
+
+  uninstall quit: "de.him_tools.webdrop-bridge"
+
+  zap trash: [
+    "~/.webdrop-bridge",
+    "~/Library/Application Support/WebDropBridge",
+    "~/Library/Preferences/de.him_tools.webdrop-bridge.plist",
+    "~/Library/Logs/WebDropBridge",
+  ]
+
+  caveats <<~EOS
+    WebDrop Bridge has been installed.
+
+    Configuration files are stored in: ~/.webdrop-bridge/
+    Logs are written to: ~/.webdrop-bridge/logs/
+
+    For documentation: https://git.him-tools.de/HIM-public/webdrop-bridge
+  EOS
+end