doc: add go playground demo for compare package

compare/compare.go

@@ -27,32 +27,38 @@ var (
 )
 
 // Equal checks if two values are equal or not. (check both type and value)
+// Play: https://go.dev/play/p/wmVxR-to4lz
 func Equal(left, right any) bool {
 	return compareValue(equal, left, right)
 }
 
 // EqualValue checks if two values are equal or not. (check value only)
+// Play: https://go.dev/play/p/fxnna_LLD9u
 func EqualValue(left, right any) bool {
 	ls, rs := convertor.ToString(left), convertor.ToString(right)
 	return ls == rs
 }
 
 // LessThan checks if value `left` less than value `right`.
+// Play: https://go.dev/play/p/cYh7FQQj0ne
 func LessThan(left, right any) bool {
 	return compareValue(lessThan, left, right)
 }
 
 // GreaterThan checks if value `left` greater than value `right`.
+// Play: https://go.dev/play/p/9-NYDFZmIMp
 func GreaterThan(left, right any) bool {
 	return compareValue(greaterThan, left, right)
 }
 
 // LessOrEqual checks if value `left` less than or equal to value `right`.
+// Play: https://go.dev/play/p/e4T_scwoQzp
 func LessOrEqual(left, right any) bool {
 	return compareValue(lessOrEqual, left, right)
 }
 
 // GreaterOrEqual checks if value `left` greater than or equal to value `right`.
+// Play: https://go.dev/play/p/vx8mP0U8DFk
 func GreaterOrEqual(left, right any) bool {
 	return compareValue(greaterOrEqual, left, right)
 }