…ike original tethys gizmo

added on_click, on_change, and on_mouse_over kwargs

There were a few bugs found when installing from a fresh test, namely:
* The version of daphne installed by default didn't meet requirements
* There was some experimental reactpy core development that I never
  backed out

* Replaces all usage of os.path with pathlib.Path
* reactpy_django detected and added to INSTALLED_APPS in settings.py
* ReactPy App scaffold now has pyproject.toml instead of setup.py

In this one instance, Path.exists throws a "File too long" error on Unix
machines, while os.path.exists dose not. I couldn't think of a good
way around that for now.

Co-authored-by: sdc50 <scott.d.christensen@erdc.dren.mil>

Co-authored-by: sdc50 <scott.d.christensen@erdc.dren.mil>

Adds tests for remaining tethys_component reactpy files
Adds reactpy-django to standard install
Fixes broken support for variable in url for pages
Adds react-loading-overlay and react-map-gl to built-in ComponentLibrary support
Fixes buggy use_workspace

The authors field cannot be present if name and email
are blank, so they are now conditional upon those
values being filled

Co-authored-by: Nathan Swain <swainn@users.noreply.github.com>

- pyproject.toml added to all scaffolds
- reactpy_base.html refactored to extend app_base.html
- minor cleanups and refactors

- Reverted last commit's swap of argparse.Namespace for mock.MagicMock since mock requires the "name" argument, which isn't allowed by MagicMock on initialization
- Added reactpy to dependencies in environment.yml