Brief summary of issue / Description of requested feature:

Add default template for packages in exporter - so people have a high-quality template to copy from. Encourage people to add gifs showcasing functionality and instructions on how to use the package. If it's a UI package, screenshots of the whole UI should be present.

Steps to reproduce the issue / Reasons for adding feature:

1. Better descriptions of packages for the players
2. Better content in the Mudlet package repository

Error output / Expected result of feature

Extra information, such as Mudlet version, operating system and ideas for how to solve / implement:

Visual Studio Code extension descriptions are a great example in this - you can get all information you need by looking at the description.