Add editorconfig

Author: tshemsedinov

.editorconfig

@@ -0,0 +1,12 @@
+# http://editorconfig.org
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[{*.js,*.mjs,*.ts,*.json,*.yml}]
+indent_size = 2
+indent_style = space