bug: size and signedness modifiers can't be mixed with other type specifiers/qualifiers

[percontation]

Did you check existing issues?

• [x] I have read all the tree-sitter docs if it relates to using the parser
• [x] I have searched the existing issues of tree-sitter-c

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

tree-sitter 0.25.2

Describe the bug

These are valid C and C++, but the tree-sitter-c grammar gets ERROR tokens (and fails to pick up the correct declarator identifier):

unsigned const int x;
unsigned const int f() {
  return 0;
}

A quick fix for these would be to allow type_qualifiers inside sized_type_specifier, but this actually doesn't capture the full extent of the issue because basically any type qualifier/specifier can be mixed with size and signedness modifiers, e.g. storage_class_specifiers: const int static long inline long volatile f();

So, possibly a better fix is to leave sized_type_specifier alone, but also allow signed/unsigned/long/short as type_qualifiers, somehow with lower precedence than the sized_type_specifier rule. This way, tree-sitter will parse the more common, contiguous sized_type_specifiers the same way as before, but can also handle less-sane interspersing of size & signedness modifiers with other sorts of qualifiers/specifiers.

Steps To Reproduce/Bad Parse Tree

Run tree-sitter-c on unsigned const int x;, see:

translation_unit [0, 0] - [1, 0]
  declaration [0, 0] - [0, 21]
    type: sized_type_specifier [0, 0] - [0, 8]
      unsigned [0, 0] - [0, 8]
    type_qualifier [0, 9] - [0, 14]
      const [0, 9] - [0, 14]
    declarator: identifier [0, 15] - [0, 18]
    ERROR [0, 19] - [0, 20]
      identifier [0, 19] - [0, 20]
    ; [0, 20] - [0, 21]

Expected Behavior/Parse Tree

At the very least: there should be no ERROR, and the declaration's declarator should be identifier [0, 19] - [0, 20]

Repro

unsigned const int x;