Improve the minimap module

[Etheroit]

• Include the minimap module source in github
• Autoupdate the example place ( https://www.roblox.com/games/11064557638/Minimap )
• Create Api documentation for the module
• Add more usage examples
• Improve the DevForum post ( https://devforum.roblox.com/t/minimap-render-gui/1995940 )
• Make the map draggable ( https://devforum.roblox.com/t/minimap-render-gui/1995940/8?u=etheroit )