[ADD] add more errors and solution

[devvsakib]

Is your feature request related to a problem? Please describe.
Need more errors with solutions. Please add every error or issue you face while using GitHub git

[nealgoogs]

I kept running into this problem while working on this project.

remote: Support for password authentication was removed on August 13, 2021.
remote: Please see https://docs.github.com/get-started/getting-started-with-git/about-remote-repositories#cloning-with-https-urls for information on currently recommended modes of authentication.
fatal: Authentication failed for 'https://github.com//github-error-solve.git/'

Solution:
Best way is to add ssh key to github settings.
So something like
1.Check if ssh keys exist already
ls -al ~/.ssh
If not
ssh-keygen -t ed25519 -C "GitHub@email.address"

2.cat ~/.ssh/id_ed25519.pub
Add the contents of this to Github settings in the access sidebar

Then finally
3. git remote set-url origin git@github.com:username/respository.git/

Needs to be much more tidy, but yeah that is the gist.