Move all solutions into separate directory (cleanup)

the beginning

solutions/making-file-names-unique/Solution.py

@@ -0,0 +1,18 @@
+# Accepted
+# Runtime: 7932 ms
+# Memory Usage: 26.5 MB
+# Submitted: January 14th, 2021
+
+class Solution:
+    def getFolderNames(self, names: List[str]) -> List[str]:
+        result = []
+        names_used = set()
+        for name in names:
+            counter = 0
+            test_name = name
+            while test_name in names_used:
+                counter += 1
+                test_name = f'{name}({counter})'
+            names_used.add(test_name)
+            result.append(test_name)
+        return result