Feature/add emission tab bottom

[Michelalmeidasilva]

Summary

Ref: Add emission in tab bar #296 Add emission should be in the tab bar for quicker access and the button "Add emission" should be removed from emissions screen

Changelog

• [x] Add emission in the tab bar
• [x] Button "Add emission" removed from emissions screen
• [x] Added a new stack navigator to add emission
• [x] Changed the tests for emission screen
• [x] Added translation for some countries

Demo

Loom | Free Screen & Video Recording Software - Watch Video

<img style="max-width:300px;" src="https://cdn.loom.com/sessions/thumbnails/e416ce590a4c4573b8d27e9f154fe440-with-play.gif">

[PierreBresson]

@Michelalmeidasilva Thanks for your contribution 🙂