Move solar and polymath to separate repos. Move hosts under oops.

[rfrenchseti]

Major restructuring:

• Move hosts/solar to new pip-installable rms-solar repo.
• Move polymath to new pip-installable rms-polymath repo. Fixes #100.
• Move hosts directory under oops and change all references as appropriate. Fixes #78.

Changes to testing:

• Fixes #64 (changed test directory warning to include resolved paths; other complaints had already been fixed)
• Remove existing backplane/unittester.py since it was really just a Cassini ISS hosts test, and put it under hosts/cassini for now. At some point we will want to restructure the Cassini hosts module to follow the same format as Galileo SSI.
• Remove contents of backplane/__init__.py for the same reason.
• Because the module names now start with oops.hosts instead of just hosts I had to create new gold master directories in Dropbox (just copies of the existing ones). Once this pull is merged, we can delete the old directories.
• I also made some changes to the gold master system:
  • Output directories are only created when needed. If there are no files being written, no directories are created.
  • There are new options --arrays and --no-arrays that control writing of the backplane arrays.
  • There are new options --summary and --no-summary that control writing of the summary.py file.
  • Fixed various bugs in argument definition.
  • By default, nothing is written (no arrays, browse, log, or summary). There is a new option --debug which turns on --arrays --browse --log --summary. You may hate this, in which case we can revert to the original behavior, but I thought that by default running a test suite should not create a bunch of files.

Minor changes:

• Update requirements.txt to use new versions of modules and new modules above. Tested with Python 3.8 and 3.12.
• Update .gitignore to be the GitHub-standard template with our local additions.
• Move .coveragerc to the top-level directory and clean up as needed.
• Remove oops/.vscode which shouldn't be under source code control in the first place.

Known problems:

• Because the majority of oops unit tests include some combination of:

        Path.reset_registry()
        Frame.reset_registry()
        Body.reset_registry()

you can't currently mix hosts and non-hosts tests in the same unittest run. Since the order of tests can't be specified, the registries are emptied and then a host needs those entries that were previously loaded. So for now you have to run, separately:

python oops/unittester.py
python oops/hosts/unittester.py

Doing this, all tests pass.

[rfrenchseti]

@jnspitale A few things:

• Your first failure has a reference to /home/spitale/pds-/pds-tools/vicar.py, which means you still have pds-tools in your PYTHONPATH. As discussed you should really remove that repo entirely from your disk to prevent things like this from happening (or at least rename it), and make sure it is removed from your environment setup as well. This explains the error TypeError: from_file() got an unexpected keyword argument 'tkdict', since the version of textkernel in pds-tools and the version that's pip-installable have radically diverged. This is an error you reported on a previous pull as well.
• The second error is explained by path issues. You DO need to have rms-oops in your PYTHONPATH if you want it to find the top-level module.