JS frontend stuff

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

frontend-vue/README.md

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+# frontend-vue
+
+This template should help get you started developing with Vue 3 in Vite.
+
+## Recommended IDE Setup
+
+[VSCode](https://code.visualstudio.com/) + [Volar](https://marketplace.visualstudio.com/items?itemName=Vue.volar) (and disable Vetur).
+
+## Type Support for `.vue` Imports in TS
+
+TypeScript cannot handle type information for `.vue` imports by default, so we replace the `tsc` CLI with `vue-tsc` for type checking. In editors, we need [Volar](https://marketplace.visualstudio.com/items?itemName=Vue.volar) to make the TypeScript language service aware of `.vue` types.
+
+## Customize configuration
+
+See [Vite Configuration Reference](https://vite.dev/config/).
+
+## Project Setup
+
+```sh
+bun install
+```
+
+### Compile and Hot-Reload for Development
+
+```sh
+bun dev
+```
+
+### Type-Check, Compile and Minify for Production
+
+```sh
+bun run build
+```
+
+### Run Unit Tests with [Vitest](https://vitest.dev/)
+
+```sh
+bun test:unit
+```
+
+### Lint with [ESLint](https://eslint.org/)
+
+```sh
+bun lint
+```