add polish git cheatsheet from #6008 and Allison's Vim from #6091

[eshellman]

What does this PR do?

• Add polish git cheatsheet from Update free-programming-books-pl.md #6008
• Add language notations in cheatsheets where clear from title/author
• Add polish git cheatsheet from Added Vim Cheet Sheet #6091

Resolves #6008, Resolves #6091, Resolves #5586

Checklist:

• Read our contributing guidelines
• Search for duplicates.
• Include author(s) and platform where appropriate.
• Put lists in alphabetical order, correct spacing.
• Add needed indications (PDF, access notes, under construction)

[eshellman]

Do other people get the error "message": "There was an error getting change files for repo:free-programming-books owner:EbookFoundation base:0000000000000000000000000000000000000000 head:31ee766b18ce03a512d7702e6259f0c9d9405ebb" in the link check?

[davorpa]

Do other people get the error "message": "There was an error getting change files for repo:free-programming-books owner:EbookFoundation base:0000000000000000000000000000000000000000 head:31ee766b18ce03a512d7702e6259f0c9d9405ebb" in the link check?

Is a wellknown issue: trilom/file-changes-action#116 caused by the push event on check the changes for first commit of a new branch.

If changes are done in a fork, at least doesn't block the PR when summited. Or make a force push or amend (commit without changes) and solved.

[davorpa]

Do other people get the error "message": "There was an error getting change files for repo:free-programming-books owner:EbookFoundation base:0000000000000000000000000000000000000000 head:31ee766b18ce03a512d7702e6259f0c9d9405ebb" in the link check?

Solved.

I have taken advantage of the fact that we are in the cheatsheets file to also go ahead with #6091 😉 Commit: 143f464

[eshellman]

thanks @davorpa