Level Editor Properties System

The idea is to have every object in level editor become manually editable.

Example, cannons currently shoot at the same exact speed, what if you were able to change the cannon's shooting speed in menu? Or scale objects like blocks to become half-block slabs? Or increase spike size?

In order for this to work, the way how the Level Editor saves and loads JSON files needs to be addressed first.

The issue names no files, tests, or entry points. Start by locating the level editor's JSON save and load code, then determine how object properties are represented; done would include a defined, working way to edit and persist properties such as cannon speed, object scale, and spike size.

Written by the indexing model from the issue text.