feat: update validation and exception handling, refactor controller routes, and enhance sales invoice item DTO

- Removed global validation pipe and added a new ValidationExceptionFilter for better error handling.
- Refactored controller routes to use underscores instead of hyphens for consistency.
- Updated CreateSalesInvoiceItemDto to include new fields: quantity, unit_type, and payload.
- Modified CreateSalesInvoiceDto to enforce items as an array with a minimum size.
- Added Enums module to provide gold karat values through a dedicated endpoint.
- Introduced new columns in the database schema for sales invoice items and goods.

src/modules/sales-invoices/dto/create-sales-invoice.dto.ts

@@ -1,5 +1,6 @@
 import { ApiProperty, PartialType } from '@nestjs/swagger'
-import { IsNumber, IsOptional, IsString } from 'class-validator'
+import { ArrayMinSize, IsNumber, IsOptional, IsString } from 'class-validator'
+import { CreateSalesInvoiceItemDto } from '../../sales-invoice-items/dto/create-sales-invoice-item.dto'
 
 export class CreateSalesInvoiceDto {
   @IsString()
@@ -7,18 +8,17 @@ export class CreateSalesInvoiceDto {
   code: string
 
   @IsNumber()
-  @ApiProperty()
+  @ApiProperty({ required: true, default: 0 })
   total_amount: number
 
-  @IsOptional()
-  @IsString()
-  @ApiProperty({ required: false })
-  description?: string
-
   @IsOptional()
   @IsString()
   @ApiProperty({ required: false })
   customer_id?: string
+
+  @ApiProperty()
+  @ArrayMinSize(1)
+  items: CreateSalesInvoiceItemDto[]
 }
 
 export class UpdateSalesInvoiceDto extends PartialType(CreateSalesInvoiceDto) {}