1.6.0

• Split macro-definition management into a dedicated, bounded preprocessing module and added in-source function-like macros.
• Added zero-argument, nested, and variadic macros together with stringizing, token pasting, and macro-redefinition checks.
• Added backslash-continued preprocessing directive lines and macro-expanded include operands.
• Completed deterministic 64-bit signed and unsigned #if values, character constants, overflow checks, and invalid-operation diagnostics.
• Added macro-argument resource limits and expanded strict C17, sanitizer, and pinned Reference BLAS/LAPACK regression coverage.