Clean up entry logic for vue.config

[cnotv]

Description

Simplify the initial mounted component in the codebase since is hard to identify and the logic is convoluted.

Context

To make the configuration readable for modern Vue initialization:

• Replace Vue instance with a created instance passed around
• Create file for any interaction with Vue instance: components, plugins, directive
• Abstract all the functions to make it simple to modify and identify
• Rename all the files with a more meaningful term