The stuff you are suggesting is a *tad* beyond what can currently be modded into Dwarf Fortress.
Not if you know how to programm avanced things, but its not the case to me, i dont even know how to modify the creatures, but i know a bit of pixel art and those...
About the mining ideas; its ok, i just want a way of creating more metals to my outpost, since requesting from caravans its really tedious and i dont have a good amount of things to exchange for, also waiting so much time for teh caravans its really boring, so:
What if people cant mine? but why not instead of people able to mine for now, why not creating robots for that?
New creature: Automaton-R340-B? (any other good name?)
Parts: Head, Body, Left Wheel set, Right wheel set, Tool arm
Material which its made from: steel (some parts are of this) while some are from rubber
Do: "Sleep" doesnt have "emotions or relationships" with others, doesnt eat, doesnt drink, doesnt bleed, doesnt feel pain, fear dizziness, Drownsy, doesnt learn, doesnt breathe... any other i forgott?
Description: A machine created by the mankind to help in dangerous labors which the humans cannot do by themselves.
These robots can mine and choop wood if equiped correctly, as they cannot learn, they however have maximun stats in minery, wood cutters, and in farming plants, however, they have to "sleep" to recharge their battery to work continously, they will also engange in combat actively if draft to military labour and can be assigned to recover wounded people, as I dont know if you can generate a creature in a workshop, they would however, come with migrants, and could be treathed as a "caste" or sentient species, as they can be assigned labours? because they dont breathe they are perfect for mining!