I made a small-ish pack that replaces Carrots with slightly modified Strawberries from Celeste.

Included Contents:
Carrot Item Texture,
Golden Carrot Item Texture,
Carrot on a Stick Item Texture,
Carrots Block Model Texture

Also includes Vanilla Tweak's Fully Aged Crop Marker. If you don't want that, delete the following files:
StrawberryCarrots.zip\assets\minecraft\models (the entire folder)
StrawberryCarrots.zip\assets\minecraft\textures\block\alert.png
StrawberryCarrots.zip\assets\minecraft\textures\block\alert.png.mcmeta
StrawberryCarrots.zip\assets\minecraft\textures\block\alert_e.png
StrawberryCarrots.zip\assets\minecraft\textures\block\alert_e.png.mcmeta

I haven't quite figured out how to change the names, as you can see by the lang folder existing, but the items still being called carrot.

Please give feedback in the comments.

Inspiration: https://www.reddit.com/r/celestegame/comments/vvsq6h/how_to_get_a_goldenstrawberry/
My Reddit post: https://www.reddit.com/r/celestegame/comments/vw1yyz/i_made_a_texturepack_for_minecraft_that_replaces/