split tests into command test and handler tests

[dylan-smith]

Split the unit tests into separate files for CommandTests and CommandHandlerTests.

Closes #638

• [x] Did you write/update appropriate tests
• [x] Release notes updated (if appropriate)
• [x] Appropriate logging output
• [x] Issue linked
• [x] Docs updated (or issue created)

[github-actions[bot]]

Integration Test Results

4 tests  ±0   4 :heavy_check_mark: ±0   19m 34s :stopwatch: -8s 1 suites ±0   0 :zzz: ±0  1 files   ±0   0 :x: ±0 

Results for commit 47e5e9c0. ± Comparison against base commit 65e406ba.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

Unit Test Results

549 tests   549 :heavy_check_mark:  2m 16s :stopwatch:     1 suites      0 :zzz:     1 files        0 :x:

Results for commit 47e5e9c0.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

Package	Line Rate	Branch Rate	Complexity	Health
Octoshift	90%	78%	829	✔
ado2gh	88%	83%	578	✔
gei	81%	87%	429	✔
bbs2gh	73%	65%	261	➖
Summary	86% (5378 / 6263)	79% (1162 / 1468)	2097	✔