Add toolkit option for specifying thread stack size
Changes affect "shared_memory" section in JSON schema, the C++ Parser, and the Runner's "initSharedMem..." routine.
2025-07-03: Due to updates GitLab may be unavailable for some minutes between 13:00 and 17:00.
Changes affect "shared_memory" section in JSON schema, the C++ Parser, and the Runner's "initSharedMem..." routine.