fix(julia_engine): Julia 1.12 support

[Nelson-numerical-software]

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[Copilot]

Pull Request Overview

This PR adds support for Julia 1.12 by updating the Julia engine module with improved variable passing and error handling mechanisms.

• Replaces direct variable assignment with a new helper function for setting Julia global variables
• Updates test cases to use the new jlrun function signature with inline Julia code execution
• Improves error handling for Julia exceptions and variable conversion failures

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
modules/tests_manager/functions/test_run.m	Adds fail status handling when output file is missing
modules/julia_engine/tests/test_variables_from_nelson.m	Updates test cases to use new Julia code execution pattern
modules/julia_engine/tests/test_jlrun.m	Adds basic tests for the updated jlrun function
modules/julia_engine/src/cpp/JuliaTypesImporters.hpp	Declares new function for creating Julia global variables
modules/julia_engine/src/cpp/JuliaTypesImporters.cpp	Implements the new global variable creation function
modules/julia_engine/src/cpp/JuliaRunFile.cpp	Updates to use new variable creation method with improved error handling
modules/julia_engine/src/cpp/JuliaRun.cpp	Updates to use new variable creation method and fixes variable naming conflicts
CHANGELOG.md	Documents Julia 1.12.0 support

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