Issue #208 - Do not move non-existing files

[martin-g]

This is a small improvement to not try to move .bashrc into .profile if .bashrc does not even exists.

This is needed for non-ephemeral self-hosted Github Actions runners where one VM could run multiple runners.

There is still a chance another GHA runner to move the file between the existsSync and io.mv calls.

[martin-g]

There is still a chance another GHA runner to move the file between the existsSync and io.mv calls.

I don't see a solution for this problem except stop using the shell rc files completely.

Would it be possible to just issue conda activate XYZ when/where needed instead of adding bashExtraText to ~/.profile ?

[goanpeca]

Thanks for working on this @martin-g

[goanpeca]

Sorry for the delays! And thanks again for your contribution 🚀