chore: update .gitignore & settings.json

Author: omar-besbes

.gitignore

@@ -17,6 +17,7 @@ build
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
+!.vscode/cp.code-snippets
 
 # Stress Tester
 /stress-tester/*

.vscode/settings.json

@@ -10,4 +10,23 @@
             "statusBarVisibility": "hidden"
         }
     },
+    "files.associations": {
+        "valarray": "cpp",
+        "bitset": "cpp",
+        "complex": "cpp",
+        "limits": "cpp",
+        "memory": "cpp",
+        "functional": "cpp",
+        "iostream": "cpp",
+        "numbers": "cpp",
+        "tuple": "cpp",
+        "*.tcc": "cpp",
+        "deque": "cpp",
+        "list": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "unordered_set": "cpp",
+        "vector": "cpp",
+        "numeric": "cpp"
+    },
 }