Centralize and document TRACE tags using X-macros (#7657)

* Introduce X-macro-based trace tag definition
- Created trace_tags.def to centralize TRACE tag definitions
- Each tag includes a symbolic name and description
- Set up enum class TraceTag for type-safe usage in TRACE macros

* Add script to generate Markdown documentation from trace_tags.def
- Python script parses trace_tags.def and outputs trace_tags.md

* Refactor TRACE_NEW to prepend TraceTag and pass enum to is_trace_enabled

* trace: improve trace tag handling system with hierarchical tagging

- Introduce hierarchical tag-class structure: enabling a tag class activates all child tags
- Unify TRACE, STRACE, SCTRACE, and CTRACE under enum TraceTag
- Implement initial version of trace_tag.def using X(tag, tag_class, description)
  (class names and descriptions to be refined in a future update)

* trace: replace all string-based TRACE tags with enum TraceTag
- Migrated all TRACE, STRACE, SCTRACE, and CTRACE macros to use enum TraceTag values instead of raw string literals

* trace : add cstring header

* trace : Add Markdown documentation generation from trace_tags.def via mk_api_doc.py

* trace : rename macro parameter 'class' to 'tag_class' and remove Unicode comment in trace_tags.h.

* trace : Add TODO comment for future implementation of tag_class activation

* trace : Disable code related to tag_class until implementation is ready (#7663).

src/ast/rewriter/cached_var_subst.cpp

@@ -65,7 +65,7 @@ expr_ref cached_var_subst::operator()() {
         // entry was already there
         m_new_keys[num_bindings] = m_key; // recycle key
         result = entry->get_data().m_value;
-        SCTRACE("bindings", is_trace_enabled("coming_from_quant"), tout << "(cache)\n";
+        SCTRACE(bindings, is_trace_enabled(TraceTag::coming_from_quant), tout << "(cache)\n";
                 for (unsigned i = 0; i < num_bindings; i++) 
                     if (m_key->m_bindings[i]) 
                         tout << i << ": " << mk_ismt2_pp(m_key->m_bindings[i], result.m()) << ";\n";