doc: adding go playground examples

func.go

@@ -1,6 +1,7 @@
 package lo
 
 // Partial returns new function that, when called, has its first argument set to the provided value.
+// Play: https://go.dev/play/p/Sy1gAQiQZ3v
 func Partial[T1, T2, R any](f func(a T1, b T2) R, arg1 T1) func(T2) R {
 	return func(t2 T2) R {
 		return f(arg1, t2)
@@ -8,11 +9,13 @@ func Partial[T1, T2, R any](f func(a T1, b T2) R, arg1 T1) func(T2) R {
 }
 
 // Partial1 returns new function that, when called, has its first argument set to the provided value.
+// Play: https://go.dev/play/p/D-ASTXCLBzw
 func Partial1[T1, T2, R any](f func(T1, T2) R, arg1 T1) func(T2) R {
 	return Partial(f, arg1)
 }
 
 // Partial2 returns new function that, when called, has its first argument set to the provided value.
+// Play: https://go.dev/play/p/-xiPjy4JChJ
 func Partial2[T1, T2, T3, R any](f func(T1, T2, T3) R, arg1 T1) func(T2, T3) R {
 	return func(t2 T2, t3 T3) R {
 		return f(arg1, t2, t3)
@@ -20,6 +23,7 @@ func Partial2[T1, T2, T3, R any](f func(T1, T2, T3) R, arg1 T1) func(T2, T3) R {
 }
 
 // Partial3 returns new function that, when called, has its first argument set to the provided value.
+// Play: https://go.dev/play/p/zWtSutpI26m
 func Partial3[T1, T2, T3, T4, R any](f func(T1, T2, T3, T4) R, arg1 T1) func(T2, T3, T4) R {
 	return func(t2 T2, t3 T3, t4 T4) R {
 		return f(arg1, t2, t3, t4)
@@ -27,6 +31,7 @@ func Partial3[T1, T2, T3, T4, R any](f func(T1, T2, T3, T4) R, arg1 T1) func(T2,
 }
 
 // Partial4 returns new function that, when called, has its first argument set to the provided value.
+// Play: https://go.dev/play/p/kBrnnMTcJm0
 func Partial4[T1, T2, T3, T4, T5, R any](f func(T1, T2, T3, T4, T5) R, arg1 T1) func(T2, T3, T4, T5) R {
 	return func(t2 T2, t3 T3, t4 T4, t5 T5) R {
 		return f(arg1, t2, t3, t4, t5)
@@ -34,6 +39,7 @@ func Partial4[T1, T2, T3, T4, T5, R any](f func(T1, T2, T3, T4, T5) R, arg1 T1)
 }
 
 // Partial5 returns new function that, when called, has its first argument set to the provided value
+// Play: https://go.dev/play/p/7Is7K2y_VC3
 func Partial5[T1, T2, T3, T4, T5, T6, R any](f func(T1, T2, T3, T4, T5, T6) R, arg1 T1) func(T2, T3, T4, T5, T6) R {
 	return func(t2 T2, t3 T3, t4 T4, t5 T5, t6 T6) R {
 		return f(arg1, t2, t3, t4, t5, t6)