Some fixes

`a *= b != c ? d : e;` is parsed incorrectly as a result

feat: add `attribute_specifier` to struct

Typedef fixes

Some minor fixes

This reverts commit eb6649e0c2.

fix: rework translation-unit top-level items to disallow binary expressions & rework top level function definition pointer association

Previously, pointers were associated with the function identifier, now they're associated with the return type

This resolves conflicts with declarations that can be interpreted as binary_expressions

feat: C23

feat: allow type_qualifiers after typedef specifier, alias char content

feat: add else_clause

fix: add compound statement to call expression

* feat: allow identifiers in string concatenations

Resolves errors in strings of the form:

   ("failed in line %" PRIdLINENR)

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Co-authored-by: Lewis Russell <lewis6991@gmail.com>

fix: allow preproc define without value to preceed a line with whitespace

add multi-bitfield structs and enums with underlying types

Adding support for offsetof

Fix AppVeyor CI builds

Update used Windows image and NodeJS version to the latest LTS

Add _Noreturn, __restrict__, and _Generic

_Generic is a C11 feature, __restrict__ and _Noreturn were added to type_qualifiers