Add .editorconfig file

.editorconfig

@@ -0,0 +1,13 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{graphql,sql,toml}]
+indent_style = space
+indent_size = 2
+
+[*.rs]
+indent_style = space
+indent_size = 4