Added a section on XML documentation standards to CONVENTIONS.md, clarified references to core and Mango.Nop framework convention docs, and improved formatting. Enabled EmitCompilerGeneratedFiles in Mango.Nop.Core.csproj.
Added Mango.Nop.Core section to copilot-instructions.md detailing workspace dependencies, framework-first design, and separation from plugin logic. Introduced ARCHITECTURE.md to define framework vs. consumer boundaries, entity mirroring, and DTO parameterization. Added CONVENTIONS.md to formalize placement rules, naming conventions, and anti-patterns, referencing AyCode.Core for shared doctrine.
Loretta