Emacs major mode for editing KDL files (https://kdl.dev/).

Features:
- Syntax highlighting
- Automatic code indentation

Installation:
- Automatic package installation from Melpa.
- Manual installation by putting the `kdl-mode.el' file in Emacs' load path.

Acknowledgement:
- Syntax highlighting using tree-sitter was adopted from:
  https://github.com/dataphract/kdl-ts-mode/