make module header

[VladimirAlexiev]

As part of #2, we need to make a module header.
I think it's used by package managers though I haven't read up about this.
Here's an example from a random org module:

;;; org-make-toc.el --- Automatic tables of contents for Org files  -*- lexical-binding: t; -*-

;; Copyright (C) 2020 Adam Porter

;; Author: Adam Porter <[email protected]>
;; URL: https://github.com/alphapapa/org-make-toc
;; Version: 0.6-pre
;; Package-Requires: ((emacs "26.1") (dash "2.12") (s "1.10.0") (org "9.3") (compat "29.1"))
;; Keywords: Org, convenience

;;; Commentary:

;; This package makes it easy to have one or more customizable tables of contents in Org files.
;; They can be updated manually, or automatically when the file is saved.  Links to headings are
;; created compatible with GitHub's Org renderer.

;;;; Installation

;; Install the packages `dash' and `s'.  Then put this file in your `load-path', and put this in
;; your init file:

;;   (require 'org-make-toc)

;;;; Usage

;; A document may have any number of tables of contents (TOCs), each of
;; which may list entries in a highly configurable way.  To make a basic
;; TOC, follow these steps:
;;
;; 1.  Choose a heading to contain a TOC and go to it.
;; 2.  Press `C-c C-x p' (`org-set-property'), add a `TOC' property, and
;;     set its value to `:include all'.
;; 3.  Run command `org-make-toc-insert' to insert the `:CONTENTS:' drawer,
;;     which will contain the TOC entries.
;; 4.  Run the command `org-make-toc' to update all TOCs in the document,
;;     or `org-make-toc-at-point' to update the TOC for the entry at point.

[johanwk]

I've taken a look at Emacs Eask.

Maybe this can help a whole lot.