Implement read RMXP events service

[Palbolsky]

Description

This PR implements a service to read the RMXP events to provide objects that can be used by a converter.

RMXP documentation: https://www.rpg-maker.fr/dl/monos/aide/xp/index.html?page=source%2Frgss%2Frgss.html

The service can be call this:

window.api.readRMXPEvents(
  { projectPath: state.projectPath!, mapId: 5 },
  ({ rmxpEvents }) => console.log(rmxpEvents),
  ({ errorMessage }) => console.error(errorMessage)
)

Note before testing

To test, you can replace the Dashboard.page (in src\views\pages\dashboard) by the following file:
Dashboard.page.zip

You can change the mapId to read an other map.

Tests to perform

• The service read the RMXP events correctly

Screenshot

Example of an event of the River map: