Added a check for standard documentation
- [ ] closes #33213 
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

I created a check to see which files contain Pandas or *pandas* which will be of use for individuals aiming to resolve issue #32316. When the codecheck script is run, it will output the files that contain those strings.
The CI is failing because of trailing whitespace in the code check file @willie3838 can you address comments https://github.com/pandas-dev/pandas/pull/33592#discussion_r413938010 and https://github.com/pandas-dev/pandas/pull/33592#discussion_r413938641 @willie3838 can you merge master and address comments closing as stale
pls ping if u want to continue