[PWGJE] jetHadronsPid task: Improve PID methods and fix list of includes

[llorenc-11]

Adding configurable group for setting up PID and function getPid for default usage in the task.
Adding histograms for positively and negatively charged hadrons.
Fixing list of include headers and used namespaces.

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for e0a061a at 2026-07-10 09:52:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 5 errors and 99 warnings.'
Found 5 errors and 99 warnings.
++ [[ 5 -gt 0 ]]
++ cat /sw/BUILD/6c335f24fe33eac3db8088854877ebec13e0d13b/O2Physics-code-check/errors.txt
PWGJE/Tasks/jetHadronsPid.cxx:434:12: error: variable 'dPi' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetHadronsPid.cxx:435:12: error: variable 'dKa' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetHadronsPid.cxx:436:12: error: variable 'dPr' is not initialized [cppcoreguidelines-init-variables,-warnings-as-errors]
PWGJE/Tasks/jetHadronsPid.cxx:458:18: error: use designated initializer list to initialize 'PidResult' [modernize-use-designated-initializers,-warnings-as-errors]
PWGJE/Tasks/jetHadronsPid.cxx:803:29: error: use 'contains' to check for membership [readability-container-contains,-warnings-as-errors]
++ [[ 99 -gt 0 ]]
++ cat /sw/BUILD/6c335f24fe33eac3db8088854877ebec13e0d13b/O2Physics-code-check/warnings.txt
PWGJE/Tasks/jetHadronsPid.cxx:461:47: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:463:52: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:465:52: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:468:49: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:470:54: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:472:54: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:475:77: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:477:82: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:479:82: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:483:66: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:485:66: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:487:72: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:496:60: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:498:44: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:500:99: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:502:43: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:504:57: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:506:86: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:508:46: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:510:54: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:512:50: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:514:80: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:521:64: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:523:93: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:525:88: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:527:87: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:529:95: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:531:98: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:533:100: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:537:40: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:550:28: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:559:30: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:567:30: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:578:28: warning: statement should be inside braces [readability-braces-around-statements]
PWGJE/Tasks/jetHadronsPid.cxx:587:30: warning: statement should be inside braces [readability-braces-around-statements]
[0 more errors; see full log]

Full log here.