feat(process): add rectify slpha api.

include/mynteye/api/api.h

@@ -237,6 +237,11 @@ class MYNTEYE_API API {
   void SetDisparityComputingMethodType(
       const DisparityComputingMethod &MethodType);
 
+  /**
+   * Set the rectify bord cut alpha.
+   */
+  void SetRectifyAlpha(const double &alpha);
+
   /**
    * Set if the duplicate frames is enable.
    */