Also in this commit:
* Update shellrc files for bash for compat with this. I might work
on adding checks for oh-my-posh later on.
Signed-off-by: Andrei Jiroh Halili <ajhalili2006@gmail.com>
* Changed shebang to regular sh for possible POSIX compatibility
* Updated header notes, probably add SPDX-License-Identifier later
Signed-off-by: Andrei Jiroh Halili <ajhalili2006@gmail.com>