feat: Added Manual Slide Control Feature

Added the "manualSlidable" feature to the Jummania Slider library, enabling users to control manual sliding behavior. Now, users can disable manual swipe by setting the "manualSlidable" attribute to "false" in XML layouts or using the setManualSlidable method programmatically. This addresses Issue #12 where users requested the ability to disable manual swipe while retaining the auto sliding functionality.