Modify some VBU style

[schlopp]

A lot of voxelbotutils' embed or button styling looks very professional, which doesn't match the goofy pp bot style

• Modify paginator to have emojis instead of text and remove the stop button
• Modify help command to look more like the old pp bot help command

[4Kaylum]

Modify paginator to have emojis instead of text and remove the stop button

Are you happy subclassing to get this, or would you prefer me to add things like button text as something you can set on __init__?

[schlopp]

I'm fine with subclassing this, though it would be a good feature for VoxelBotUtils