Added file for left and right shift rotation

[AnshumanAryan24]

Added the following:
Bit-Manipulation: Rotate right and rotate left.
Note: Only applicable for positive integers

1. rotate_right(num, times): rotate num(passed as decimal) "times" times towards right and return
   eg.: rotate_right(12, 1) --> 6
2. rotate_left(num, times): rotate num(passed as decimal) "times" times towards left and return
   eg.: rotate_left(12, 2) --> 3
   Additional functions:
3. unsigned dec_to_bin(num): return decimal form of binary format number
   eg.: dec_to_bin(12) --> 1100
4. unsigned bin_to_dec(bin): return binary form of decimal format number
   eg.: bin_to_dec(1100) --> 12