Gamspy

-------------
- General
- Make all file read and writes with utf-8 encoding.
- Fix model instance record columns.
- Allow all iterables for equations argument of model.
- Fix the bug in socket connection messages.
- Testing
- Add a test to verify the columns of symbols in model instance solves.
- Test set difference for model equations argument.

-------------
- General
- Make trace file name dynamic to avoid race condition on parallel runs.
- Fix log options for GAMS Engine backend.
- Initial support for GAMSPy to Latex.
- Generate solver options file under container working directory instead of current directory.
- Fix implicit set issues for toGams function.
- Documentation
- Add links to the api reference for symbols and functions mentioned in the documentation.
- Minor documentation corrections.
- Testing
- Logout from GAMS Engine only on Python 3.12 to avoid unauthorized calls on parallel jobs.
- Add tests to verify the behaviour of different logoption values.
- Add tests for GAMSPy to Latex.

-------------
- General
- Fix hanging issue on Windows for GAMS Engine backend.
- Refactor toGams converter.
- Fix solver options file path bug.
- Testing
- Add more tests for GAMS MIRO.

-------------
- General
- Change default solvers to 'CONOPT', 'CONVERT', 'CPLEX', 'GUSS', 'IPOPT', 'IPOPTH', 'KESTREL', 'NLPEC', 'PATH', and 'SHOT'
- Fix the version of gamspy_base when "gamspy update" command is being executed.
- Fix the order issue for Alias in toGams function.
- Add exponential backoff for GAMS Engine logout api.
- Add symbol validation for Ord operation.
- Testing
- Update model library tests according to the new default solvers.
- Add a test to verify that modifiable symbols cannot be in conditions for model instance runs.
- Add new tests for symbol validation.

-------------
- General
- Set the records of objective value in model instance solves.
- Allow using an environment variable to set the GAMS system directory (given environment variable will override the system directory even if the user provides a system directory argument to Container).
- Use gdxSymbols commandline option instead of manually marking symbols dirty.
- Add memory_tick_interval, monitor_process_tree_memory, and profile_file options.
- Change the way to generate GAMS model from a GAMSPy model.
- Remove import_symbols argument for addGamsCode since it is not needed anymore.
- Documentation
- Redirect model library page to gamspy-examples Github repo.
- Update toGams docs.
- Update doctest of addGamsCode.
- Testing
- Add model instance tests that check the objective value.
- Update system directory test to adjust to the environment variable support.
- Add tests for profiling options.

-------------
- General
- Support output redirection for NEOS backend.
- Support GAMSPy to GAMS automatic conversion.
- Add support for old way of installing a license.
- Documentation
- Update model documentation to show how to redirect NEOS output to a file.
- Add examples to all public functions in API Reference.
- Testing
- Add a new model (knapsack) to the model library.