Support wildcards in <PolySharpIncludeGeneratedTypes> property

[Athari]

Description

1. Support wildcards like "System.Diagnostics.CodeAnalysis.*Null*Attribute" and "**.*Null*Attribute" in the <PolySharpIncludeGeneratedTypes> MSBuild property.
2. Support type names without namespaces. I think it's safe to assume that there won't be name conflicts.

Rationale

Currently <PolySharpIncludeGeneratedTypes> property requires explicitly listing the full name of every type. If I want only attributes related to nullability analysis, I have to list 9 attributes, with namespaces and all. It would be nice to significantly simplify configuration with wildcards:

1. Shorter: potentially just one short line instead of a huge block of copy-pasted namespaces.
2. Easier: no need to remember full namespaces of every type.

Proposed API

<PolySharpIncludeGeneratedTypes>
    **.*Null*Attribute; Range; Index; System.Runtime.Versioning.*
</PolySharpIncludeGeneratedTypes>

replaces:

<PolySharpIncludeGeneratedTypes>
  System.Diagnostics.CodeAnalysis.AllowNullAttribute;
  System.Diagnostics.CodeAnalysis.DisallowNullAttribute;
  System.Diagnostics.CodeAnalysis.MaybeNullAttribute;
  System.Diagnostics.CodeAnalysis.MaybeNullWhenAttribute;
  System.Diagnostics.CodeAnalysis.MemberNotNullAttribute;
  System.Diagnostics.CodeAnalysis.MemberNotNullWhenAttribute;
  System.Diagnostics.CodeAnalysis.NotNullAttribute;
  System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute;
  System.Diagnostics.CodeAnalysis.NotNullWhenAttribute;
  System.Range;
  System.Index;
  System.Runtime.Versioning.RequiresPreviewFeaturesAttribute;
</PolySharpIncludeGeneratedTypes>

1. strings without dots are prefixed with **.
2. ** turns into .+ regex
3. * turns into \w+ regex
4. all regexes start with ^, end with $ and are case-insensitive
5. all other characters are escaped

Drawbacks

1. A bit more code in the library.

Alternatives

1. Trickery with MSBuild transforms like:

   <ItemGroup>
     <PolySystem Include="Range;Index" />
     <PolyAnalysisAttrs Include="AllowNull;DisallowNull;MaybeNull;MaybeNullWhen;MemberNotNull;MemberNotNullWhen;NotNull;NotNullIfNotNull;NotNullWhen" />
   </ItemGroup>
   
   <ItemGroup>
     <PolyInclude Include="@(PolySystem->'System.%(Identity)')" />
     <PolyInclude Include="@(PolyAnalysisAttrs->'System.Diagnostics.CodeAnalysis.%(Identity)Attribute')" />
   </ItemGroup>
   <Target Name="PolySharpIncludeTransform" BeforeTargets="ConfigurePolySharpMSBuildProperties">
     <PropertyGroup>
       <PolySharpIncludeGeneratedTypes>@(PolyInclude, ',');System.Runtime.Versioning.RequiresPreviewFeaturesAttribute</PolySharpIncludeGeneratedTypes>
     </PropertyGroup>
   </Target>

   It's marginally shorter, but 10x harder to understand and more fragile.

Other thoughts

1. Can implement myself if approved