Use better internationalisation solutions

[deepansh96]

Currently, all our translations live inside our codebase. The industry-standard way to do this is to have a website/solution manage all that for us. During deployment, those solutions will inject all the relevant translations into our production build so they can be used by the client.

This way, non developers can also add translations.

To use - Transifex, localise.com (any system that supports .po files)