Example of .toc file for an extra addon for ElvUI.
Just copy/past below lines in a .toc file and edit it.

## Interface: 40000
## Title: |cff1784d1ElvUI Example|r
## Notes: This is the tooltip text show in character screen, addon list, when mouse is over this mod.
## Author: Your nickname
## Version: 1.00
## RequiredDeps: ElvUI

example.lua