Remove PipeReader APIs from AcBinaryDeserializer
Refactored to remove all PipeReader-based async deserialization methods from AcBinaryDeserializer. Updated BINARY_TODO.md to clarify that draining PipeReader to AsyncPipeReaderInput is now a consumer responsibility. Refactored AcBinaryInputFormatter to inline the drain-loop and background deserialization, following new layering guidance. Updated comments and docs to reflect these changes.
AcBinary: ASCII string opt, Type-based API, MVC support
- Add ASCII-optimized string serialization/deserialization with new FixStrAscii/StringAscii markers for fast byte→char widening.
- Introduce non-generic Type-based Serialize/Deserialize overloads for runtime-typed scenarios (plugin, MVC, model binding).
- Add AcBinaryInputFormatter/OutputFormatter and AddAcBinaryFormatters extensions for ASP.NET Core MVC integration.
- Update project references and close ACCORE-BIN-T-N9G6 in docs.
Loretta