Added Python solution for 118. Pascal's Triangle (#127)

Author: JoyKrishan

Algorithms/Easy/118_PascalsTriangle/Solution.py

@@ -0,0 +1,18 @@
+class Solution:
+    def generate(self, numRows: int) -> List[List[int]]:
+        triangle = []
+        first_row = [1]
+
+        triangle.append(first_row)
+
+        for i in range(1, numRows):
+            prev_row = triangle[i - 1]
+            new_row = [1]
+
+            for j in range(1, i):
+                new_row.append(prev_row[j - 1] + prev_row[j])
+            
+            new_row.append(1)
+            triangle.append(new_row)
+        
+        return triangle