JS frontend stuff

Move old ember frontend to properly named folder
Add vue based new frontend

frontend-old-ember/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "extends": "@tsconfig/ember/tsconfig.json",
+  "compilerOptions": {
+    // The combination of `baseUrl` with `paths` allows Ember's classic package
+    // layout, which is not resolvable with the Node resolution algorithm, to
+    // work with TypeScript.
+    "baseUrl": ".",
+    "paths": {
+      "frontend-reactive/tests/*": ["tests/*"],
+      "frontend-reactive/*": ["app/*"],
+      "*": ["types/*"]
+    }
+  }
+}