Added the implementation for Shortest Remaining Time First (SRTF) CPU scheduling algorithm

[X] Added description of change
[X] Added file name matches File name guidelines
[X] Added tests and example, test must pass
[X] Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
[X] Relevant documentation/comments is changed or added
[X] PR title follows semantic commit guidelines
[X] Search previous suggestions before making a new one, as yours may be a duplicate.
[X] I acknowledge that all my contributions will be made under the project's license.

Notes:

TheAlgorithms / C-Plus-Plus