Add first test with vitest and start using GitHub Actions

[Angelmmiguel]

This MR aims to provide stability to the project by including a full test suite to the project. This MR will focus on adding the framework and configuring GitHub actions so any new commit will be properly tested.

The plan is to switch to vitest for the following reasons:

• Jest contains many many features this project won't use
• The number of dependencies is considerably higher on jest than vitest (333 vs 47)
• Learning purposes

For thes reasons, this project will start using vitest.