Bob Nystrom
64dab4db78
Introduce a new `WREN_TRACE_GC` compile-time flag in `wren_common.h` to enable dedicated GC tracing independently from general memory tracing. When either `WREN_TRACE_MEMORY` or `WREN_TRACE_GC` is set, include `<time.h>` and modify `collectGarbage()` to measure elapsed wall-clock time using `clock()`. The GC trace now reports bytes before and after collection, bytes collected, the next GC threshold, and the duration in seconds. Also move the `-- gc --` header print and the `nextGC` calculation inside the tracing guard to avoid side-effects when tracing is disabled.