Typescript config

[radupasparuga]

So far our Vue components, Vuex store modules, Mixins are written in plain JS, contradicting our attempt to use Typescript.
I will keep track of the progress of the "conversion" in this issue

Goals:

• use Typescript-style Vue components with Options API
• write Vuex store modules in Typescript
• write Mixins in Typescript

[radupasparuga]

Closing as we are no longer using typescript on the project