Support Vite 8

[IlCallo]

We should start exploring Vite 8 support for vitest and Cypress AEs

• study Vite 8 changelog and breaking changes
• check Vitest and Cypress AE work with Vite 8 already
• add 2 separate test projects (one for Vite 7.2+ and one for Vite 8) keep only one test project for Vite 8

As mentioned here, Vite 8 is supported from Cypress 15.14+
We may be able to support it without a new major version, but let's discuss this after we release the current open PR

Since we already have app-vite 2.5.0 out in the wild supporting Vite 8, we'll skip support for:

• app-vite 2.4.x
• Vite 7.x
• Cypress 15 before 15.14 version