Draft: feat: new ACTS gx2f integration

Very work in progress, but getting it up for better sharing.

TODO:

• format code
• check naming
• test a bit more
• Add necessary changes to ACTS:
  • https://github.com/acts-project/acts/pull/3333
  • https://github.com/acts-project/acts/pull/3336
  • https://github.com/acts-project/acts/pull/3411
• wait for new ACTS release https://github.com/acts-project/acts/issues/3575
• wait for ACTS version update in ATHENA