Geometry hackathon: tracking for FCC-hh tracker

[mehrunnisamirza2]

learn more about ACTS and discuss ideas for improving tracking at the FCC-hh tracker at ultimate conditions

[mehrunnisamirza2]

• clean up XML and c++ code of my local changes for FCC-hh geometry conversion in ACTS
• push it to FCC-hh official repo
• rebuild FCC-hh tracking geometry using Gen3
• discuss and implement ideas for improving tracking at the FCC-hh

[github-actions]

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