feat: add api documentation - #12

Use explicit type instead of 'var' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0008)

Use explicit type instead of 'var' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0008)

Use explicit type instead of 'var' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0008)

'new' expression can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0090)

'new' expression can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0090)

'new' expression can be simplified (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0090)

Use explicit type instead of 'var' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0008)

Use explicit type instead of 'var' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0008)

Non-nullable field '_predictionEngine' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.