feat: add 0218 Valid Anagram solution

Author: hyogshin

valid-anagram/hyogshin.py

@@ -0,0 +1,14 @@
+class Solution:
+    def isAnagram(self, s: str, t: str) -> bool:
+        l = list(s)
+        for d in t:
+            if d in s and d in l:
+                l.remove(d)
+            else:
+                return False
+
+        if not l:
+            return True
+        else:
+            return False
+