chore: Add EditorConfig file

Author: hyperupcall

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.rb]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false