Inconsistent capitalization for asset names: LANDs, NAMEs, etc.

## 🎉 Description

Throughout the UI text and documentation, the capitalization rules for asset names are inconsistent. Sometimes it's "NAME", sometimes it's "Name", sometimes it's "name". Same for "LAND", "Land", "land".

We should settle on a consistent style guideline for how to write these, and apply that rule consistently throughout the text.

* [ ] 🐛 This is a bug report.
* [ x] 📈 This is a feature request.

## 📝 Details

Navigating around menus, it's noticeable that there's no consistent rule for whether LAND and NAME are capitalized or not. Even at the Marketplace main menu, the items are listed as "Collectibles, Land, NAMEs" and clicking NAME prompts you to "Claim your decentraland NAME". This seems to establish that NAMEs are always capitalized, but then they're just called Names or names in various other places.

## 🔢 Steps To Reproduce Issue [ Good To Have ]

Search UI text for "NAME", "Name", "name" and note the lack of consistency.

## 👍 Other Information

Not an urgent problem obviously, but something that would be nice to fix I think.