Can anyone make more different type of seed mod as well add more new character into the games

Can someone make me more different type of seed mode that can let you grow them in winter as well diffent type of fruit and vegetabls as well add new character and animal into this games... without replace the current animal as well the current npc on the game, as well we can see our child grow and see them helping us with the farms work... add new rivals for the player on the farms. See our other npc get married and many more