Add .editorconfig file

[renatonascalves]

#27 shows that devs will apply their own editor configs and mess with the code. I suggest adding a .editorconfig, to stop this from happening in the future.

[ntwb]

This is adapted from the latest version from WP core for use here:

# This file is for unifying the coding style for different editors and IDEs
# http://editorconfig.org
 
# WordPress Coding Standards
# https://make.wordpress.org/core/handbook/coding-standards/
 
root = true
 
[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
indent_style = tab
 
[{package.json,*.yml}]
indent_style = space
indent_size = 2

[ePascalC]

File created, thanks both.