feat: tests and some relevant cleanup

[deluca-mike]

No description provided.

[github-actions]

Changes to gas cost

Generated at commit: d41f418ce10addb4cecce702ba6368dde9a53973, compared to commit: 0d8273640e783dff8e402a0f2df4de0f1eb3849f

🧾 Summary (20% most significant diffs)

Contract	Method	Avg (+/-)	%
MockM	setCurrentIndex	+2,486 ❌	+7.71%

---

Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
MockM	214,604 (0)	currentIndex setCurrentIndex	404 (0) 26,553 (-12)	0.00% -0.05%	2,100 (+1,316) 34,747 (+2,486)	+167.86% +7.71%	2,404 (+2,000) 26,565 (0)	+495.05% 0.00%	2,404 (0) 43,653 (0)	0.00% 0.00%	336 (+273) 71 (+65)
MockRegistrar	203,503 (0)	setListContains	22,565 (0)	0.00%	39,249 (+250)	+0.64%	44,477 (0)	0.00%	44,477 (0)	0.00%	8 (+4)

[github-actions]

LCOV of commit 02e3e44 during Forge Coverage #90

Summary coverage rate:
  lines......: 95.1% (135 of 142 lines)
  functions..: 93.6% (44 of 47 functions)
  branches...: no data found

Files changed coverage rate:
                           |Lines       |Functions  |Branches    
  Filename                 |Rate     Num|Rate    Num|Rate     Num
  ===============================================================
  src/WrappedMToken.sol    |98.3%    118|97.1%    35|    -      0

[toninorair]

Great work with clean-ups and introduction of unchecked blocks