♻️ migrate to TUnit

[Odonno]

Thank you for submitting this pull request! We appreciate you spending the time to work on these changes.

What does this change do?

• Migrate tests from xUnit to TUnit
• Refactor test pattern by creating a new ApplySchemaAsync function
• Define a new constant to disable embedded mode, so that anyone can run tests without having to build the local Rust crates (meaning it will run global tests & remote mode)
• Create a new bash script to easily disable embedded mode
• Update readme
• Fix CI (updated csharpier to the latest version)

What is your testing strategy?

Tested locally via the .NET CLI

Is this related to any issues?

N/A

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 79.20792% with 21 lines in your changes missing coverage. Please review.

Project coverage is 73.09%. Comparing base (6fd2105) to head (b28db7f).
Report is 39 commits behind head on main.

Files with missing lines	Patch %	Lines
...Net/Internals/Cbor/Converters/RecordIdConverter.cs	45.45%	6 Missing ⚠️
.../Internals/Cbor/Converters/RecordIdOfTConverter.cs	0.00%	6 Missing ⚠️
SurrealDb.Net/SurrealDbClient.cs	91.66%	0 Missing and 3 partials ⚠️
...s/Cbor/Converters/JsonPatchDocumentConverterOfT.cs	33.33%	2 Missing ⚠️
...ons/DependencyInjection/SurrealDbOptionsBuilder.cs	50.00%	1 Missing ⚠️
...nals/Cbor/Converters/JsonPatchDocumentConverter.cs	66.66%	1 Missing ⚠️
...r/Converters/JsonPatchDocumentConverterProvider.cs	88.88%	1 Missing ⚠️
...rrealDb.Net/Internals/Cbor/SurrealDbCborOptions.cs	75.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #167      +/-   ##
==========================================
+ Coverage   69.65%   73.09%   +3.44%     
==========================================
  Files         161      174      +13     
  Lines        6702     7234     +532     
  Branches      775      760      -15     
==========================================
+ Hits         4668     5288     +620     
+ Misses       1689     1645      -44     
+ Partials      345      301      -44     

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