feat: implement drop functionality

- Added `drop()` function in buckets.
- Implemented `Drop()` function for Table.

bucket.go

@@ -26,6 +26,17 @@ func (b bucket[K, V]) get(key K) (value V, found bool) {
 	return slot.value, slot.occupied && b.compare(slot.key, key)
 }
 
+func (b bucket[K, V]) drop(key K) (occupied bool) {
+	slot := &b.slots[b.location(key)]
+
+	if slot.occupied && b.compare(slot.key, key) {
+		slot.occupied = false
+		return true
+	}
+
+	return false
+}
+
 func (b *bucket[K, V]) resize(capacity uint64) {
 	b.slots = make([]slot[K, V], capacity)
 	b.capacity = capacity

table.go

@@ -111,10 +111,15 @@ func (t *Table[K, V]) Put(key K, value V) (err error) {
 
 // Drop removes a value for a key in the table. Returns an error if its value
 // cannot be removed.
-//
-// Deprecated: Do not use.
-func (t Table[K, V]) Drop(_ K) {
-	panic("Not implemented")
+func (t Table[K, V]) Drop(key K) (err error) {
+	t.bucketA.drop(key)
+	t.bucketB.drop(key)
+
+	if t.load() < t.minLoadFactor {
+		return t.resize()
+	}
+
+	return nil
 }
 
 // Entries returns an unordered sequence of all key-value pairs in the table.