Add feature: Find and replace

#1

Basic editing feature that will save us all time editing.

#2

Honestly there are so many other necessary things, that I don’t see that one important, for now why not control/command F? If it’s bulk, just copy paste it into a text editor, since it’s markdown language, you won’t lose the format.

#3

Sure, I can CMD+F to find stuff, but can’t replace them all at once like Google Docs or other apps. Like I said, it’s not a dead-urgent thing—just a basic editing feature that will save everyone time when editing.