add array-oriented setters to the RVec3 and Quat classes

src/main/java/com/github/stephengold/joltjni/Quat.java

@@ -120,6 +120,19 @@ public void set(float x, float y, float z, float w) {
         this.w = w;
     }
 
+    /**
+     * Set all 4 components from the specified array.
+     *
+     * @param array the desired component values (not null, length≥4,
+     * unaffected)
+     */
+    public void set(float[] array) {
+        this.x = array[0];
+        this.y = array[1];
+        this.z = array[2];
+        this.w = array[3];
+    }
+
     /**
      * Create a rotation quaternion from Euler angles. Rotation order is X then
      * Y then Z.

src/main/java/com/github/stephengold/joltjni/RVec3.java

@@ -139,6 +139,18 @@ public void set(double x, double y, double z) {
         this.zz = z;
     }
 
+    /**
+     * Set all 3 components from the specified array.
+     *
+     * @param array the desired component values (not null, length≥3,
+     * unaffected)
+     */
+    public void set(double[] array) {
+        this.xx = array[0];
+        this.yy = array[1];
+        this.zz = array[2];
+    }
+
     /**
      * Alter the first (X) component.
      *