Add overload that uses single value on all sides

Author: synercoder

src/Synercoding.Primitives/Extensions/RectangleExtensions.cs

@@ -18,6 +18,19 @@ public static Rectangle Contract(this Rectangle rectangle, Spacing spacing)
             urx: rectangle.URX - spacing.Right,
             ury: rectangle.URY - spacing.Top);
 
+    /// <summary>
+    /// Contract a given <see cref="Rectangle"/> (make smaller).
+    /// </summary>
+    /// <param name="rectangle">The <see cref="Rectangle"/> to contract.</param>
+    /// <param name="value">The amount of <see cref="Value"/> to contract on all sides.</param>
+    /// <returns>A new contacted <see cref="Rectangle"/>.</returns>
+    public static Rectangle Contract(this Rectangle rectangle, Value value)
+        => new Rectangle(
+            llx: rectangle.LLX + value,
+            lly: rectangle.LLY + value,
+            urx: rectangle.URX - value,
+            ury: rectangle.URY - value);
+
     /// <summary>
     /// Expand a given <see cref="Rectangle"/> (make bigger).
     /// </summary>
@@ -31,6 +44,19 @@ public static Rectangle Expand(this Rectangle rectangle, Spacing spacing)
             urx: rectangle.URX + spacing.Right,
             ury: rectangle.URY + spacing.Top);
 
+    /// <summary>
+    /// Expand a given <see cref="Rectangle"/> (make bigger).
+    /// </summary>
+    /// <param name="rectangle">The rectangle to expand</param>
+    /// <param name="value">The amount of <see cref="Value"/> to expand on all sides.</param>
+    /// <returns>A new expanded <see cref="Rectangle"/>.</returns>
+    public static Rectangle Expand(this Rectangle rectangle, Value value)
+        => new Rectangle(
+            llx: rectangle.LLX - value,
+            lly: rectangle.LLY - value,
+            urx: rectangle.URX + value,
+            ury: rectangle.URY + value);
+
     /// <summary>
     /// Get the raw values representing this <see cref="Rectangle"/> in a provided unit.
     /// </summary>