Instead of making a huge 1024x16 000 image, you might use a 2k square image but put the UV next to each other, like so :
Then for the editable part, inside blender it’s quite hard, maybe just share some photoshop preset or a .blend file that allows to generate the texture, using compositor for post process effects.
There is no text editor for procedural textures inside blender so it’s nearly a dead end. Coming with a big hack to allows that , like generating all the text as mesh with geometry nodes, is probably going to be quite impractical.
Unless you have really good reasons to edit the text, like for a personal project, I’ll try to keep things simpler 
Have fun !