Changed structure of the toolbox

[DenisaCG]

I removed the default blocks from the niryo and ned toolboxes, as in the latest updates we added a lot of other categories related strictly to the robots and the interface got too crowded. Instead, I added a Basics category, which includes some default blocks they would need.

[hbcarlos]

I believe when using the niryo toolbox, we still have access to the default toolbox so that we can use basic blocks from there.
Maybe it is not necessary to create the section Basics.

[DenisaCG]

That's true, they still have access to all the default blocks! I added the Basics category just for easier and faster access to some blocks the user may need the most often (e.g. a number or text blocks), so they don't need to switch toolboxes for that. @hbcarlos