feat: add config option gutter_symbols

src/config.zig

@@ -5,6 +5,7 @@ theme: []const u8 = "default",
 input_mode: []const u8 = "flow",
 gutter_line_numbers: bool = true,
 gutter_line_numbers_relative: bool = false,
+gutter_symbols: bool = true,
 enable_terminal_cursor: bool = true,
 enable_terminal_color_scheme: bool = builtin.os.tag != .windows,
 highlight_current_line: bool = true,