Add validators and services for Product Galleries and Product Tags

- Implemented Create, Delete, Get, and Update validators for Product Galleries.
- Added Create, Delete, Get, and Update validators for Product Tags.
- Created service classes for handling Discount Categories, Discount Orders, Discount Products, Discount Shopping Cart, Product Categories, Product Galleries, and Product Tags.
- Each service class integrates with CQRS for command and query handling.
- Established mapping profiles for Product Galleries.

src/CMSMicroservice.Application/CategoryCQ/Queries/GetAllCategoryByFilter/GetAllCategoryByFilterQueryHandler.cs

@@ -10,7 +10,7 @@ public class GetAllCategoryByFilterQueryHandler : IRequestHandler<GetAllCategory
 
     public async Task<GetAllCategoryByFilterResponseDto> Handle(GetAllCategoryByFilterQuery request, CancellationToken cancellationToken)
     {
-        var query = _context.Categorys
+        var query = _context.Categories
             .ApplyOrder(sortBy: request.SortBy)
             .AsNoTracking()
             .AsQueryable();

src/CMSMicroservice.Application/CategoryCQ/Queries/GetCategory/GetCategoryQueryHandler.cs

@@ -11,7 +11,7 @@ public class GetCategoryQueryHandler : IRequestHandler<GetCategoryQuery, GetCate
     public async Task<GetCategoryResponseDto> Handle(GetCategoryQuery request,
         CancellationToken cancellationToken)
     {
-        var response = await _context.Categorys
+        var response = await _context.Categories
             .AsNoTracking()
             .Where(x => x.Id == request.Id)
             .ProjectToType<GetCategoryResponseDto>()