Update Vite build output and remove test file

Added Vite build output directories to .gitignore and configured Vite to output to ../wwwroot. Removed obsolete App.spec.ts test file from GUI/src/__tests__.

GUI/src/__tests__/App.spec.ts

@@ -1,11 +0,0 @@
-import { describe, it, expect } from 'vitest'
-
-import { mount } from '@vue/test-utils'
-import App from '../App.vue'
-
-describe('App', () => {
-  it('mounts renders properly', () => {
-    const wrapper = mount(App)
-    expect(wrapper.text()).toContain('You did it!')
-  })
-})