feat: add package header

Add the standard package header for Emacs packages.

emacs/nekonight-moon-theme.el

@@ -1,3 +1,44 @@
+;;; nekonight-moon-theme.el --- NekoNight, an all-around theme -*- lexical-binding: t -*-
+
+;; Copyright (C) 2024 Bruno Ciccarino
+
+;; Author: Bruno Ciccarino
+;; URL: https://github.com/BrunoCiccarino/nekonight
+;; Keywords: faces, theme, nekonight, moon
+
+;; Package-Version: 0.0.3
+;; Package-Requires: ((emacs "24.0"))
+
+;; SPDX-License-Identifier: MIT
+
+;; This file is not part of GNU Emacs.
+
+;; Permission is hereby granted, free of charge, to any person obtaining a copy
+;; of this software and associated documentation files (the "Software"), to deal
+;; in the Software without restriction, including without limitation the rights
+;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+;; copies of the Software, and to permit persons to whom the Software is
+;; furnished to do so, subject to the following conditions:
+
+;; The above copyright notice and this permission notice shall be included in all
+;; copies or substantial portions of the Software.
+
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+;; SOFTWARE.
+
+;;; Commentary:
+
+;; Looking for a theme that fits your vibe? Whether you're into dark mode,
+;; light mode, or something in between, this NekoNight has got you covered.
+;; It's a buffet of color schemes for every taste and mood.
+
+;;; Code:
+
 (deftheme nekonight-moon
   "Nekonight-Moon color theme for Emacs 24")