Graphics are pretty simple to implement as it's a pretty similar set up to the objects you've already been working with.
Hoever many txt files you want can go into the graphics folder and they look for an image file starting in that directory (the game comes with a folder for images to encourage organization.)
DEFAULT, STANDARD, BABY, CHILD, DRUNK, THIEF, MASTER_THIEF
MINER
WOODWORKER, CARPENTER, BOWYER, WOODCUTTER
STONEWORKER, ENGRAVER, MASON, ARCHITECT
RANGER, ANIMAL_CARETAKER, ANIMAL_TRAINER, HUNTER, TRAPPER, ANIMAL_DISSECTOR
METALSMITH, FURNACE_OPERATOR, WEAPONSMITH, ARMORER, BLACKSMITH
JEWELER, GEM_CUTTER, GEM_SETTER
CRAFTSMAN, WOODCRAFTER, STONECRAFTER, LEATHERWORKER, BONE_CARVER, WEAVER, CLOTHIER, GLASSMAKER, STRAND_EXTRACTOR
FISHERY_WORKER, FISHERMAN, FISH_DISSECTOR, FISH_CLEANER
FARMER, CHEESE_MAKER, MILKER, COOK, THRESHER, MILLER, BUTCHER, TANNER, DYER, PLANTER, HERBALIST, BREWER, SOAP_MAKER, POTASH_MAKER, LYE_MAKER, WOOD_BURNER
*the last four on this line are actually one row down because there's more than 16 farmer professions
ENGINEER, MECHANIC, SIEGE_ENGINEER, SIEGE_OPERATOR, PUMP_OPERATOR
RECRUIT, WRESTLER, SPEARMAN, SWORDSMAN, AXEMAN, HAMMERMAN, CROSSBOWMAN, MACEMAN, LASHER, PIKEMAN, BLOWGUNMAN, BOWMAN
CHAMPION, (same as above but with MASTER_)
*the nobility is kind of wonkey as they've been put into the extra space from the short professions, and several of the entries point to the same position because, well, you what could you have a clerk and book keeper and mayor and leader hold that you could easily tell apart?
CLERK, ADMINISTRATOR, TRADER, MERCHANT, DIPLOMAT, OUTPOSTLIAISON
MAYOR, LEADER, CAPTAIN_OF_THE_GUARD, SHERIFF, MANAGER, BOOKKEEPER, BROKER
HIGH_PRIEST, PRIEST, SHOPKEEPER, SLAVE, PRISONER
DRUID, GUILDREP, MERCHANTBARON, MERCHANTPRINCE
TAXCOLLECTOR, EXECUTIONER, PHILOSOPHER, ADVISOR, ALCHEMIST, DUNGEONMASTER
BARON, BARON_CONSORT, COUNT, COUNT_CONSORT, DUKE, DUKE_CONSORT, KING, KING_CONSOR
Things without DEFAULT status:
GUARD: the military professions again,
ROYALGUARD: and again
SKELETON: military but no elites
ZOMBIE: same
Also: I can't produce pixel art of an at all satisfactory quality but I'd have zero difficulty putting things together the way I mentioned and I can probably do a passable job of color editing so in the case of graphics that fit an easy format and who's authors don't mind alterations to their work I could supply some of the graphics for this, particularly in the case of stuff that's similar to what was already in the game.