chore: add jest config

Author: janniks

.vscode/launch.json

@@ -1,6 +1,17 @@
 {
   "version": "0.2.0",
   "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Jest: api",
+      "cwd": "${workspaceFolder}/packages/api",
+      "program": "./node_modules/.bin/jest",
+      "args": [
+        "--runInBand"
+      ],
+      "console": "integratedTerminal"
+    },
     {
       "type": "node",
       "request": "launch",