Configure linter + prettier.

- This is based on existing expectations for TS code in Google-esc repos.
- First part of the change (we have not run any linter or formatting commands). After this changeset goes in I'll do a mass changeset push.

Fixes https://b.corp.google.com/issues/411384603

.vscode/launch.json

@@ -1,29 +1,23 @@
 {
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Attach",
-            "port": 9229,
-            "request": "attach",
-            "skipFiles": [
-                "<node_internals>/**"
-            ],
-            "type": "node"
-        },
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Launch Program",
-            "skipFiles": [
-                "<node_internals>/**"
-            ],
-            "program": "${file}",
-            "outFiles": [
-                "${workspaceFolder}/**/*.js"
-            ]
-        }
-    ]
-}
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Attach",
+      "port": 9229,
+      "request": "attach",
+      "skipFiles": ["<node_internals>/**"],
+      "type": "node"
+    },
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Program",
+      "skipFiles": ["<node_internals>/**"],
+      "program": "${file}",
+      "outFiles": ["${workspaceFolder}/**/*.js"]
+    }
+  ]
+}