INTL0003 triggers on generated main methods

Create a new minimal API ASP.NET Core project.
Observed: The analyzer triggers on the generated main method.


I suggest we make the analyzer ignore all methods that do not start with a letter or underscore (Full language spec here: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure#643-identifiers)

Start by reproducing the issue with a minimal API ASP.NET Core project and identify where analyzer INTL0003 evaluates the generated main method. Use the linked C# identifier specification as guidance. Done means generated methods no longer trigger INTL0003 while ordinary methods continue to be checked.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.