Add Analyzer Benchmarks

[MartyIX]

Follow-up to #1477

@brminnick Sorry for being slow. You merged the PR before I could reply (sorry for being slow again ;)). I created this PR to simply show what can be done. But if you don't like the changes, don't worry, all are optional, I think you got it right.

[TheCodeTraveler]

Thanks @MartyIX! I added a quick + dirty Benchmark to ensure these changes improve performance + allocations. I basically just leveraged the CommunityToolkit.Maui.Analyzers.UnitTests I wrote in #1477 and ran them as benchmarks, which is why the Method name in the tables below matches the methods in CommunityToolkit.Maui.Analyzers.UnitTests.

It looks like the updates in this PR have slightly worse mean, plus an additional Gen2 allocation.

Current Analyzer Benchmarks (main branch)

Method	Mean	Error	StdDev	Median	Gen0	Gen1	Gen2	Allocated
VerifyNoErrorsWhenUseMauiCommunityToolkit	5.623 ms	0.2329 ms	0.6529 ms	5.356 ms	250.0000	62.5000	-	1.54 MB
VerifyNoErrorsWhenUseMauiCommunityToolkitHasAdditonalWhitespace	4.721 ms	0.0942 ms	0.2499 ms	4.636 ms	265.6250	78.1250	15.6250	1.51 MB
VerifyErrorsWhenMissingUseMauiCommunityToolkit	7.079 ms	0.2126 ms	0.5855 ms	7.076 ms	406.2500	156.2500	31.2500	2.25 MB

Updated Analyzer Benchmarks (PR #2217)

Method	Mean	Error	StdDev	Median	Gen0	Gen1	Gen2	Allocated
VerifyNoErrorsWhenUseMauiCommunityToolkit	6.171 ms	0.1589 ms	0.4403 ms	6.114 ms	281.2500	93.7500	31.2500	1.54 MB
VerifyNoErrorsWhenUseMauiCommunityToolkitHasAdditonalWhitespace	5.403 ms	0.2031 ms	0.5924 ms	5.340 ms	265.6250	109.3750	15.6250	1.51 MB
VerifyErrorsWhenMissingUseMauiCommunityToolkit	7.773 ms	0.3835 ms	1.1004 ms	7.448 ms	406.2500	125.0000	31.2500	2.23 MB

Next Steps

I'll revert the changes to the Analyzers in this PR, keeping the /* language=C#-test */ for syntax highlighting.

I'll then add CommunityToolkit.Maui.Analyzers.Benchmarks to this PR and update our CI/CD pipeline to include the results as artifacts.

Thanks again for all of your help!