Revert "Integrate gui in main codebase"

Integrate gui in main codebase

Add ability to filter tests

Fail job if unittest unsuccessful

Try to fix nb sanitizer

Test that we can use development version of backend

Extend startup tests to other warning messages

Clean up testing caller

Update CLI tests

Update test suite to test warm starts

Add warm_start test

Remove custom environment tests

Fix click API usage

WIP move `python -m pysr.test` call to click interface

Disable unused install command

Add pre-commit hook for isort

Fix formatting

Added more informative help message

Fixed missing variable pointer

Implemented PR changes.

Updated instructions to install Julia dependencies

Refactored to remove relative file reference

Added click and install