Main changes since v0.9.1

Core/kernel evolution and robustness

- Many refactor and fix commits in GP/kernel internals.
- Improvements around hashing/signatures, invariants, serialization
  correctness, and crossover logic/stats.

Dataframe/classification improvements

- Added/support refined manual dataframe setup.
- Better handling of classification output domains and schema invariants.
- Related performance and concept/constraint tightening work.

Interpreter/cache behavior

- Added interpreter rebinding support for cache reuse.
- Clarified and documented execution/caching/thread-safety behavior.

Plotting/analytics enhancements

- Better crossover dynamics plotting and run-summary visualization
  quality.
- Improvements to scaling/visual cues based on data quality.

Tooling/build/docs modernization

- CMake modernization and link/dependency fixes.
- Broader doxygen documentation expansion.
- `setversion.py` hardening and parsing modernization.

Testing expansion

- Significant addition/strengthening of doctest and robustness tests.
- Determinism and race/flakiness improvements in test behavior.

Recent feature slice

- New "directory mode" for batch merging summary XMLs and related parser
  hardening/tests in the latest commits.

As ULTRA continues to grow, we want to ensure that the code base rema…

…ins modern, concise and maintainable. With that in mind, we're beginning a gradual transition to C++23 across the project.

This means that ULTRA v0.9.0 is the last version fully compatible with C++20. All new development on the main branch will require a C++23-compliant toolchain.

See https://ultraevolution.org/blog/moving_to_cc23/

docs: update version to v0.9.0

feat: add preliminary version of WOPR

Issue #17

Squashed commit of the following:

commit 598852c
Merge: 2d43b4a fbe7a22
Author: Manlio Morini <morinim@gmail.com>
Date:   Tue Dec 31 17:35:49 2024 +0100

    Merge branch 'main' into wopr

commit 2d43b4a
Author: Manlio Morini <morinim@gmail.com>
Date:   Tue Dec 31 17:02:57 2024 +0100

    fix: fix fatal error when hiding main header

    See ocornut/imgui#6683

commit 32b2a7e
Author: Manlio Morini <morinim@gmail.com>
Date:   Mon Dec 30 13:32:01 2024 +0100

    refactor: change error bars width

commit a6fcddb
Author: Manlio Morini <morinim@gmail.com>
Date:   Sun Dec 29 21:28:17 2024 +0100

    feat: add age-by-layer plot

commit 4a1b15f
Author: Manlio Morini <morinim@gmail.com>
Date:   Sat Dec 28 15:47:30 2024 +0100

    feat: highlight only the full part of a layer

commit 1e5de39
Author: Manlio Morini <morinim@gmail.com>
Date:   Sat Dec 28 10:49:34 2024 +0100

    feat: add command line usage message

commit 76bc465
Author: Manlio Morini <morinim@gmail.com>
Date:   Fri Dec 27 18:16:28 2024 +0100

    feat: add labels to heatmap plot

commit 6d04ee3
Author: Manlio Morini <morinim@gmail.com>
Date:   Fri Dec 27 14:41:25 2024 +0100

    refactor: reduce CPU usage

commit dd9779b
Author: Manlio Morini <morinim@gmail.com>
Date:   Thu Dec 26 22:48:42 2024 +0100

    feat: add preliminary support for plotting layers file

commit 394a812
Author: Manlio Morini <morinim@gmail.com>
Date:   Tue Dec 24 18:48:43 2024 +0100

    feat: add list of best programs found

commit d35df44
Author: Manlio Morini <morinim@gmail.com>
Date:   Mon Dec 23 17:51:27 2024 +0100

    feat: remove legend and add alpha effect in scattered plot

commit 2125a64
Author: Manlio Morini <morinim@gmail.com>
Date:   Sun Dec 22 23:58:30 2024 +0100

    feat: add preliminary support for plotting population file

commit 3ff4cdf
Author: Manlio Morini <morinim@gmail.com>
Date:   Sun Dec 15 22:24:37 2024 +0100

    feat: add autoscaling

commit 17488e2
Author: Manlio Morini <morinim@gmail.com>
Date:   Sat Nov 30 15:57:50 2024 +0100

    feat: add support for implot library

commit 6b4f218
Author: Manlio Morini <morinim@gmail.com>
Date:   Sun Nov 17 20:57:43 2024 +0100

    feat: plot best fitness (preliminary version)

commit 03fda6e
Author: Manlio Morini <morinim@gmail.com>
Date:   Wed Nov 13 12:22:54 2024 +0100

    fix: close the program properly on user request

commit a7d81e4
Author: Manlio Morini <morinim@gmail.com>
Date:   Thu Nov 7 19:07:18 2024 +0100

    feat: add dynamic sequences memorization

commit 28daf54
Merge: 620e67f b05de36
Author: Manlio Morini <morinim@gmail.com>
Date:   Wed Nov 6 17:33:15 2024 +0100

    Merge branch 'main' into wopr

commit 620e67f
Author: Manlio Morini <morinim@gmail.com>
Date:   Wed Nov 6 15:41:55 2024 +0100

    feat: add dynamic file reading procedure

commit d18ca8a
Merge: 6beeb34 81fb19e
Author: Manlio Morini <morinim@gmail.com>
Date:   Tue Nov 5 18:11:50 2024 +0100

    Merge branch 'main' into wopr

commit 6beeb34
Author: Manlio Morini <morinim@gmail.com>
Date:   Mon Nov 4 17:42:53 2024 +0100

    feat: add `dynamic_data` struct

commit f90be72
Author: Manlio Morini <morinim@gmail.com>
Date:   Sat Nov 2 12:00:02 2024 +0100

    feat: add support for user specified log files

commit a91c35d
Merge: b86b1cd 8007e59
Author: Manlio Morini <morinim@gmail.com>
Date:   Sat Nov 2 10:54:34 2024 +0100

    Merge branch 'main' into wopr

commit b86b1cd
Author: Manlio Morini <morinim@gmail.com>
Date:   Tue Oct 29 17:27:04 2024 +0100

    feat: add Argh third party library

    See https://github.com/adishavit/argh

commit edc1d90
Author: Manlio Morini <morinim@gmail.com>
Date:   Mon Oct 28 09:38:53 2024 +0100

    feat: add skeleton of the new graphical dashboard

    Issue #17

docs: set version to 0.5.0

doc: change revision number v0.4.0