chore: exclude local files changes from git staging

[vyavdoshenko]

chore: added script to ignore local file changes in files mentioned in .gitignore but still shown as changed
docs: CONTRIBUTING.md has been updated
docs: tools/local/SETUP_GIT_IGNORE_LOCAL.md was added

[romange]

Curious, how it is better than .gitignore? in any case, we put utilities that help local development under tools/local

[vyavdoshenko]

Curious, how it is better than .gitignore? in any case, we put utilities that help local development under tools/local

@romange
These files are in .gitignore added before me. That doesn't help, I verified that on two dev environments. It worked via .gitignore in the past. I used that by simply adding files to the .gitignore. It doesn't work any longer. I guess modern git versions don't support this approach.
That's why I suggest this solution.

[romange]

interesting, what does not work with .gitignore? It works on my machine - i just changed .vscode/settings.json and it does not show locally.

[vyavdoshenko]

interesting, what does not work with .gitignore? It works on my machine - i just changed .vscode/settings.json and it does not show locally.