Drawer - RTL position prop values, example names, resizable drawer

[tlabaj]

The following need to be fixed for RTL support

• The resizable drawer does not work in RTL. Splitter gets moved in opposite direction.
• Consider changing position prop enumeration values of left and right to be more meaningful for both right-to-left and left-to-right languages.
• Also update the examples that refer to "left" or "right".