FSL 6.0.7.9, 13th March 2024

fslpy 3.18.0 -> 3.18.1

BF: Use a unique identifier for the current thread of execution, otherwise collisions occur when running concurrent wrapper functions
TEST: Test concurrent wrapper function execution
TEST: Awkward unit test for fot collision. Not particularly robust

Doc/cli mistakes
BF: Fix conflicting long-form cli options
ENH: New first_utils --saveAverageMesh option, which outputs the average mesh as a VTK file

Having a surface version of the group average mesh allows for better visualisation of results.

DOC: Fix errors in first cli option help text
STY: consistent whitespace/indentation
BF: Fix conflicting long-form cli options
STY: Normalise indentation
ENH: New first_utils --saveAverageMesh option, which outputs the average mesh as a VTK file

ENH: New pre-trained model for Cynomolgus Macaque, provided by Takuya Hayashix
New pre-trained NHP_HCP_MacaqueCyno model, for NHP-HCP BOLD fMRI of Macaca fascicularis, provided by Takuya Hayashi. The associated mask images can be used when performing feature extraction by specifying --species macaque_cyno.
Added the macaque mask images used with the NHP_HCP_Macaque model, as they had been accidentally omitted in the previous two versions.
Built-in models can now be referred to by their alias (as specified in pyfix/resources/models/info.json), or their file name prefix.

MNT: Update dependencies (should have been in last release)
CI: xgboost/optuna in dev image
BF: Fix mask packaging
ENH: New NHP HCP macaque_cyno mask images, provided by Takuya Hayashi
BF: Fix to log message
ENH,BF: New cynomolgus macaque model, provided by Takuya Hayashi. Fix typo in info.json
RF: Accept either alias or model file name prefix for built-in models
TEST: Sanity check test for builtin models
DOC: Changelog, note about new model
BF: Use species ID saved in model file when running main fix
TEST: Test that species ID saved in model file is used