FIX[BE]: fix logic on Chickin Laying not convert to layer but still Pullet, and inisiate laying transfer migration and base basic API

internal/entities/laying_transfer_source.go

@@ -0,0 +1,23 @@
+package entities
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type LayingTransferSource struct {
+	Id                          uint           `gorm:"primaryKey"`
+	LayingTransferId            uint           `gorm:"index;not null"`
+	SourceProjectFlockKandangId uint           `gorm:"not null"`
+	ProductWarehouseId          *uint          `gorm:""`
+	Qty                         float64        `gorm:"type:numeric(15,3);not null"`
+	Note                        string         `gorm:"type:text"`
+	CreatedAt                   time.Time      `gorm:"autoCreateTime"`
+	UpdatedAt                   time.Time      `gorm:"autoUpdateTime"`
+	DeletedAt                   gorm.DeletedAt `gorm:"index"`
+
+	LayingTransfer            *LayingTransfer      `gorm:"foreignKey:LayingTransferId;references:Id"`
+	SourceProjectFlockKandang *ProjectFlockKandang `gorm:"foreignKey:SourceProjectFlockKandangId;references:Id"`
+	ProductWarehouse          *ProductWarehouse    `gorm:"foreignKey:ProductWarehouseId;references:Id"`
+}