feat: add initial benchmark project

[vbreuss]

From #147:
Add initial benchmarks for comparison between TUnit.Assertions, FluentAssertions and this project:

• Happy Case for string should be equal
• Happy Case for bool should be true

[github-actions]

Stryker.NET mutation tested the changes in the pull request:

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (21e003a)	5988	5717	95.47%
Head commit (f161f26)	5988 (+0)	5717 (+0)	95.47% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#149)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

This is addressed in release v0.4.0.