Create an editorconfig file (#392)

An editorconfig file helps to maintain consistent style across different
editors. Many editors support using the `.editorconfig` file to
determine settings such as indentation level out of the box. Most IDEs
that do not have support out of the box have a simple plugin available.
Even tools such as prettier use this file (see
https://prettier.io/docs/configuration#editorconfig). See
https://editorconfig.org/ for more information.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

fake.neo

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

.editorconfig

@@ -0,0 +1,9 @@
+# EditorConfig is awesome: https://EditorConfig.org
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true