Tests

[rickecon]

• [x] make format and make documentation has been run. (You may also want to run make test.)

This PR:

• Reinstates running build_and_test.yml on push after merge.
• Limits docs_check.yml to only run on pull request commits.
• Updates some tags in README.md.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.45%. Comparing base (912b70c) to head (65105f6). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #79 +/- ## ======================================= Coverage 98.45% 98.45% ======================================= Files 1802 1802 Lines 26697 26697 Branches 142 142 ======================================= Hits 26285 26285 Misses 381 381 Partials 31 31 ``` | [Flag](https://app.codecov.io/gh/TheCGO/fiscalsim-us/pull/79/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TheCGO) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/TheCGO/fiscalsim-us/pull/79/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TheCGO) | `98.45% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=TheCGO#carryforward-flags-in-the-pull-request-comment) to find out more.

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