feat: goto_bracket goes to the pair bracket under cursor

Uses simple matching nesting, as a complement to tree-sitter approach.

Flow mode shorcut ctrl+shit+\ ala Code

src/buffer/unicode.zig

@@ -50,6 +50,15 @@ pub const char_pairs = [_]struct { []const u8, []const u8 }{
     .{ "«", "»" },
 };
 
+pub const open_close_pairs = [_]struct { []const u8, []const u8 }{
+    .{ "(", ")" },
+    .{ "[", "]" },
+    .{ "{", "}" },
+    .{ "‘", "’" },
+    .{ "“", "”" },
+    .{ "«", "»" },
+};
+
 fn raw_byte_to_utf8(cp: u8, buf: []u8) ![]const u8 {
     var utf16le: [1]u16 = undefined;
     const utf16le_as_bytes = std.mem.sliceAsBytes(utf16le[0..]);