Add a tooltip to hovering on instructions that describes the behavior of the instruction

[roeming]

[roblabla]

IDA's FRIEND extension is a great reference here: https://github.com/alexhude/FRIEND. It contains XML files for x86_64, MIPS and ARM7 that give the documentation for each instruction, along with the page number in the associated ISA manual where that instruction is documented: https://github.com/alexhude/FRIEND/tree/master/Configurations