refactor: import Shiny from module

[jakubsob]

Changes

Import Shiny from a module to hide implementation details how this object is retrieved. It keeps diff smaller and allows easier control how we access Shiny object (no need to change Shiny to window.Shiny in multiple files).

[codecov-commenter]

Codecov Report

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[andyquinterom]

Love these changes! Thank you so much for the suggestions.!