Tests: Vitest configuration cleanup (#5888)

## Summary

Simplify default scripts. Filtering is still available to users, we can
revisit tagging or grouping later.
This fixes the issue where we had tests that were in the codebase but
never run because they weren't under `/src/components`

Also deletes the duplicate litegraph tests and their associated vitest
config file.

## Changes

- **What**: Test cleanup

## Review Focus

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5888-Tests-Vitest-configuration-cleanup-2806d73d36508197b800f68f0b028279)
by [Unito](https://www.unito.io)

src/renderer/extensions/vueNodes/widgets/components/WidgetInputText.test.ts

@@ -137,19 +137,6 @@ describe('WidgetInputText Value Binding', () => {
     })
   })
 
-  describe('Readonly Mode', () => {
-    it('disables input when readonly', () => {
-      const widget = createMockWidget('readonly test')
-      const wrapper = mountComponent(widget, 'readonly test', true)
-
-      const input = wrapper.find('input[type="text"]')
-      if (!(input.element instanceof HTMLInputElement)) {
-        throw new Error('Input element not found or is not an HTMLInputElement')
-      }
-      expect(input.element.disabled).toBe(true)
-    })
-  })
-
   describe('Component Rendering', () => {
     it('always renders InputText component', () => {
       const widget = createMockWidget('test value')