Implement the system routine C$SLEEP

[yutaro-sakamoto]

This pull request implements system routine C$SLEEP`.

[Copilot]

Pull Request Overview

This PR implements the system routine C$SLEEP to add a delay feature in the COBOL runtime. Key changes include:

• Adding test cases for prog1 and prog2 that verify C$SLEEP delays program execution.
• Implementing C$SLEEP in the Java runtime and updating system definitions.
• Updating Makefiles and test include files to register the new system routine.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/run.src/system-routines.at	New test cases for verifying the C$SLEEP behavior in COBOL programs.
tests/run.at	Inclusion of the system-routines test file.
tests/Makefile.in	Updated Makefile dependency list to include system-routines.
tests/Makefile.am	Updated Makefile dependency list to include system-routines.
libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/call/CobolSystemRoutine.java	Added implementation of C$SLEEP in the runtime.
cobj/typeck.c	Removed the obsolete handling for C$SLEEP to route it to the new implementation.
cobj/system.def	Updated system routine mapping to register the new C$SLEEP implementation.

Comments suppressed due to low confidence (2)

tests/run.src/system-routines.at:21

• The sleep duration is set to 4 seconds in the test but the check only requires a delay of at least 2 seconds. Consider updating the check to better align with the expected delay for more accurate test coverage.

test $duration -ge 2], [0],

libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/call/CobolSystemRoutine.java:146

• Verify that the hardcoded parameter value '3' is correct for C$SLEEP, given that only the first parameter is used. Clarifying this may help maintain future modifications.

        CobolUtil.COB_CHK_PARMS("C$SLEEP", 3);