feat: rectangle app, mac install bump

script/install.d/03-apt.sh

@@ -17,8 +17,8 @@ if command -v apt-get &> /dev/null; then
     sudo apt-get install -qq "${apt_packages[@]}"
 
     unset apt_packages
+
+    apt --version
 else
     echo "Skipping: apt-get not found"
 fi
-
-apt --version

script/install.d/71-rectangle.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# -----------------------------------------------------------------------------
+# Description:
+#   (macOS only) Install Rectangle.
+#
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    if ! brew list --cask rectangle &> /dev/null; then
+        brew install --cask rectangle
+    else
+        echo "Rectangle is already installed."
+    fi
+fi