Is your feature request related to a problem? Please describe.
The snippet feature is great, but I get frustrated that it has limited options.

Describe the solution you'd like
I'd like you to be able to do the following things with snippets:

- Reorder, filter and search for snippets
I have 100+ snippets saved, but there's no way to reorder them, you have to scroll awkwardly through the long list. Dragging and dropping the ordering would be useful, as well as a filter at the top to reorder by name, date added etc...
I'd also say that snippet groups would be useful, for categorising types of snippets.

- Upload and export snippets
I've spent hours creating these wonderful, time-saving, life-saving snippets and i'd like to share them with a colleague. Being able to export the snippets would be awesome, as we could have the snippet file shared centrally for everyone to use at my company. They can then upload and enjoy using them.

Describe alternatives you've considered
There are no alternatives unfortunately. Other than me documenting what snippets that I use and writing a guide on how to add the snippets, but that would be a time-consuming process.

Additional context
Context around this, we will have many users across the world who use MJML to edit and produce our emails. So it would be much easier sharing useful snippets between teams.