[PWGJE] Add new plots for Ds jets

[monamelop]

These changes enable differential invariant mass analysis in bins of pT, z and DeltaR.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 6 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/o2 for 97ef6f9 at 2026-04-06 05:29:

## sw/BUILD/O2Physics-latest/log
cc1plus: fatal error: /sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGJE/Tasks/jetDsSpectrumAndSubstructure.cxx: No such file or directory
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 2af931f at 2026-04-06 06:09:

## sw/BUILD/O2Physics-latest/log
CMake Error at cmake/O2PhysicsAddExecutable.cmake:113 (add_executable):
CMake Error at cmake/O2PhysicsAddExecutable.cmake:113 (add_executable):

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 548551c at 2026-04-06 09:26:

## sw/BUILD/O2Physics-latest/log
cc1plus: fatal error: /sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGJE/Tasks/jetDsSpectrumAndSubstructure.cxx: No such file or directory
ninja: build stopped: subcommand failed.

Full log here.

[monamelop]

Hi,

The workflow name for this task has been updated to follow the O2 naming convention:

• from: jetDsSpec
• to: jet-ds-spec-subs (file: jetDsSpecSubs.cxx)

However, the O2 linter is still failing due to workflow naming inconsistencies in other entries in PWGJE/Tasks/CMakeLists.txt (e.g. emc-* workflows), which are unrelated to this PR.

Could you please advise how to proceed in this case?

Thanks!