add support for depth in barcode generations

- Introduced depth parameter to EncodeWithDepth function to allow generating barcodes with specified color depth.
- Updated Encode function to use EncodeWithDepth with a default depth of 16.

code93/encoder.go

@@ -74,9 +74,7 @@ func prepare(content string) (string, error) {
 	return result, nil
 }
 
-// Encode returns a code93 barcode for the given content
-// if includeChecksum is set to true, two checksum characters are calculated and added to the content
-func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.Barcode, error) {
+func EncodeWithDepth(content string, includeChecksum bool, fullASCIIMode bool, depth int) (barcode.Barcode, error) {
 	if fullASCIIMode {
 		var err error
 		content, err = prepare(content)
@@ -104,7 +102,13 @@ func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.B
 	}
 	result.AddBit(true)
 
-	return utils.New1DCode(barcode.TypeCode93, content, result), nil
+	return utils.New1DCodeWithDepth(barcode.TypeCode93, content, result, depth), nil
+}
+
+// Encode returns a code93 barcode for the given content
+// if includeChecksum is set to true, two checksum characters are calculated and added to the content
+func Encode(content string, includeChecksum bool, fullASCIIMode bool) (barcode.Barcode, error) {
+	return EncodeWithDepth(content, includeChecksum, fullASCIIMode, 16)
 }
 
 func getChecksum(content string, maxWeight int) rune {