Add git commit info to version output (-v/-V switches)

[fglock]

Summary

• Unify version to 5.42.0 (replaces separate jarVersion/perlVersion)
• Add gitCommitId and gitCommitDate fields to Configuration.java
• Inject git info at build time (Gradle and Maven)
• Update -v output format to match Perl:

  This is perl 5, version 42, subversion 0 (v5.42.0) built for JVM (abc123 2024-03-10)
  

• Update -V output to show PerlOnJava section with version and git info
• Update Configure.pl with:
  • Safer regex pattern for value matching
  • Version safety check (minor >= 40 to protect 5.10, 5.38, etc.)
  • Exclude dirs: src/main/perl/, dev/
  • Exclude files: docs/about/changelog.md
  • Targeted Config.pm updates
  • Updates jperl, jperl.bat, README.md
• Dynamically use version in help message

Files Changed

• Configure.pl - Version management script
• build.gradle - Git info injection task + version update
• pom.xml - Git info injection plugin + version update
• jperl / jperl.bat - Launcher scripts version update
• README.md - Feature support version
• Configuration.java - Unified version + git fields
• ArgumentParser.java - New -v/-V output format
• Java files referencing old perlVersion field

Test Plan

• ./gradlew clean shadowJar builds successfully
• java -jar target/perlonjava-5.42.0.jar -v shows git info
• java -jar target/perlonjava-5.42.0.jar -V shows version section
• ./Configure.pl shows current configuration
• ./Configure.pl -D version=5.10.0 fails (safety check)
• ./Configure.pl -D version=5.43.0 updates all files correctly
• ./gradlew test passes

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