Add .editorconfig

Author: chmanie

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+insert_final_newline = true
+charset = utf-8
+trim_trailing_whitespace = true
+end_of_line = lf
+
+[*.{js,json,ts,tsx}]
+indent_style = space
+indent_size = 2
+
+[*.{md,markdown}]
+trim_trailing_whitespace = false