Creating custom block bases

I've seen several people wanting to add specific block bases (the three main ones I would want is redstone dust, torch, and lantern). But instead of the team adding them, what if we could add them ourselves?

Like the Import Structure feature, you would import a .zip folder with all of the models for each block state using a new "import block base" button next to (or near) the Import Structure button.

Adding a Sign Block type would be a good idea as well, and a custom procedure in the .zip folder that tells when to change block states or add text to a sign-like block.

This new custom block base would then appear in the block bases section when you create a new block.