Add pre-commit configuration and fix newline issues in various files

.vscode/launch.json

@@ -9,4 +9,4 @@
             "console": "integratedTerminal"
         }
     ]
-}
+}

.vscode/settings.json

@@ -36,4 +36,4 @@
         "tobytes",
         "unsignedinteger"
     ]
-}
+}