Method attribute support.

[otac0n]

In order to decorate a weave function with an attribute, it must be made private and wrapped with the desired attribute. This is not always sufficient.

Please support partial methods or a direct way to express any C# attribute from the .weave file.

[otac0n]

Syntax suggestion:

@[MethodInvocation(a, b, c)]

[otac0n]

Consider space in the syntax for supporting class-level attributes, even nested classes #16

[otac0n]

C# Spec, for inspiration:

https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/grammar#a3-syntactic-grammar

attribute_section
    : '[' attribute_target_specifier? attribute_list ']'
    | '[' attribute_target_specifier? attribute_list ',' ']'
    ;