Replace uber-jar with Jib layered Docker build

[velo]

Summary

• Replaced Maven shade plugin uber-jar approach with Jib maven plugin for layered Docker builds
• Migrated from fat JAR to separate dependency and application layers for better Docker layer caching
• Resolved dependency conflicts with guice-multibindings and flink-s3-fs-hadoop shading issues
• Added DataSQRL's fixed flink-s3-fs-hadoop version to avoid Jackson/Guava conflicts
• Fixed resource loading by using Jib's generated classpath file

Changes Made

• Removed shade plugin configuration from sqrl-cli/pom.xml
• Added Jib maven plugin with layered image configuration
• Updated Dockerfile to use separate dependency and application layers
• Fixed entrypoint.sh to use Jib's classpath including resources directory
• Updated dependency management to use DataSQRL's flink-s3-fs-hadoop:1.19.3-6
• Added GitHub Packages repository for DataSQRL artifacts
• Resolved guice version conflicts by standardizing on 7.0.0
• Added Maven enforcer rules to prevent problematic dependency versions

Test plan

• [x] Build Docker image using Jib
• [x] Verify container starts without permission errors
• [x] Confirm resource loading works (server-config.json)
• [ ] Run integration tests to verify full functionality
• [ ] Test Docker layer caching behavior

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 11.33%. Comparing base (b6b0fc6) to head (a058134). :white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #1511       +/-   ##
=============================================
- Coverage     60.10%   11.33%   -48.78%     
+ Complexity     2585      571     -2014     
=============================================
  Files           484      484               
  Lines         14932    14932               
  Branches       1830     1830               
=============================================
- Hits           8975     1692     -7283     
- Misses         5148    13078     +7930     
+ Partials        809      162      -647     

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