LanguageAdapter for VB.NET

[Attilio81]

What's needed

A LanguageAdapter for VB.NET (.vb files) that handles:

1. L1 module headers — using ' single-quote comment blocks (VB has no
   docstring syntax)
2. L2 function rules — ' comment block immediately below Sub/Function
   signature
3. Structural extraction — VB.NET has tree-sitter support
   (tree-sitter-vb) that could be used similarly to the existing C# adapter
4. Idempotent inject/update — detect and replace existing block if present

Relevant existing work

• C# adapter (languages/csharp.py) is the closest reference — VB.NET and C#
  share many structural patterns (classes, methods, properties)
• tree-sitter-vb parser exists and is maintained
• VB.NET is widely used in enterprise/ERP legacy systems (NTS Informatica,
  Microsoft Dynamics NAV, etc.) — significant untapped user base

Notes on VB.NET specifics

• No docstrings — use ' comment blocks (already our approach above)
• Methods use Sub (void) and Function (return value) instead of def
• Classes declared with Public Class ... End Class
• Common enterprise patterns: Imports statements, Module blocks

Happy to contribute or test a prototype if helpful.