feat: foreignKeys check

+fix: "unnamed" field bug

tests/testdata/src/foreign_key_check/negative.go

@@ -0,0 +1,12 @@
+package foreign_key_check
+
+type User struct {
+	Name         string
+	CompanyRefer uint
+	Company      Company `gorm:"foreignKey:CompanyRefer"`
+}
+
+type Company struct {
+	ID   int
+	Name string
+}

tests/testdata/src/foreign_key_check/positive.go

@@ -0,0 +1,27 @@
+package foreign_key_check
+
+type PrepTask struct {
+	Id          uint `gorm:"primaryKey"`
+	Description string
+	TaskId      uint
+	WorkAreaId  uint
+	WorkArea    `gorm:"foreignKey:WorkAreaIds;constraint:OnDelete:CASCADE;"` // want "Foreign key \"WorkAreaIds\" mentioned in tag at field \"WorkArea\" doesn't exist in model \"PrepTask\""
+	Deadline    int64
+}
+
+type WorkArea struct {
+	Id          uint `gorm:"primaryKey"`
+	Name        string
+	Description string
+	Performance uint
+	PrepTasks   []PrepTask `gorm:"constraint:OnDelete:CASCADE;"`
+}
+
+type Shift struct {
+	Id            uint `gorm:"primaryKey"`
+	Description   string
+	ProductAmount uint
+	ShiftDate     int64
+	WorkAreaId    string   // want "Foreign key should have type like int, not \"string\""
+	WorkArea      WorkArea `gorm:"foreignKey:WorkAreaId;"`
+}