ENH: Move PyperclipException and PyperclipWindowsException to error/_…
- [x] xref #27656. this GitHub issue is being done in multiple parts
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).

I noticed that there weren't a lot of test around the functions that used PyperclipException & PyperclipWindowsException. So, I took a stab at adding some. Let me know if this unwarranted.

Also, the github only mentioned  PyperclipException, so not sure if we also want to move PyperclipWindowsException, but I did so just in case. 
Thanks again @dataxerik !