feat: move ForEach method from collection to set.

Author: ghosind

collection.go

@@ -14,15 +14,13 @@ type Collection[T any] interface {
 	// Contains returns true if this collection contains the specified element.
 	Contains(e T) bool
 
-	// ContainsAll returns true if this collection contains all of the elements in the specified collection.
+	// ContainsAll returns true if this collection contains all of the elements in the specified
+	// collection.
 	ContainsAll(c ...T) bool
 
 	// Equals compares this collection with the object pass from parameter.
 	Equals(o any) bool
 
-	// ForEach performs the given handler for each elements in the collection until all elements have been processed or the handler returns an error.
-	ForEach(func(e T) error) error
-
 	// IsEmpty returns true if this collection contains no elements.
 	IsEmpty() bool
 

list.go

@@ -0,0 +1,9 @@
+package collection
+
+type List[T any] interface {
+	Add(T)
+
+	AddAll(...T)
+
+	Insert(int, T)
+}

set.go

@@ -6,4 +6,8 @@ type Set[T comparable] interface {
 
 	// Clone returns a copy of this set.
 	Clone() Set[T]
+
+	// ForEach performs the given handler for each elements in the collection until all elements
+	// have been processed or the handler returns an error.
+	ForEach(func(e T) error) error
 }