check whether integer is even or odd using bit manupulation (#7099)

* even_or_not file added

* Updated DIRECTORY.md

* modified DIRECTORY.md

* Update bit_manipulation/even_or_not.py

* updating DIRECTORY.md

* Rename even_or_not.py to is_even.py

* updating DIRECTORY.md

Co-authored-by: luciferx48 <laukik.22010776@gmail.com>
Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>