Merge pull request 'Add `.editorconfig` file to enforce codestyle in compatible editors' (#3091) from editorconfig into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/3091
Reviewed-by: ancientmarinerdev <ancientmariner_dev@proton.me>

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+end_of_line = lf
+
+[*.lua]
+charset = utf8
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
+keep_one_space_between_table_and_bracket = false
+spaces_around_operators = true