Start of milestone changes for 8.1

[BHoMBot]

Update assembly file version to 8.1.0.0
Update copyright headers to new year 2025

[IsakNaslundBh]

@BHoMBot check serialisation
@BHoMBot check project-compliance
@BHoMBot check null-handling

[bhombot-ci]

@IsakNaslundBh to confirm, the following actions are now queued:

• check serialisation
• check project-compliance
• check null-handling

[bhombot-ci]

FAO: @adecler @pawelbaran @IsakNaslundBh
@IsakNaslundBh is seeking dispensation on this Pull Request to skip a required check. Please can you provide authorisation for the check to be skipped, or provide assistance as appropriate.

The check they wish to have dispensation on is project-compliance.

If you are providing dispensation on this occasion, please reply with:

@BHoMBot this is a DevOps instruction. I am authorising dispensation to be granted on check ref. 34706125846

[IsakNaslundBh]

@BHoMBot this is a DevOps instruction. I am authorising dispensation to be granted on check ref. 34706125846

[bhombot-ci]

@IsakNaslundBh I have now provided a passing check on reference 34706125846 as requested.

[IsakNaslundBh]

Project compliance dispensated and issue raised #493

[IsakNaslundBh]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: copyright-compliance

[bhombot-ci]

@IsakNaslundBh I have provided neutral checks to the checks requested. These checks will need to be run properly to obtain full results.

[IsakNaslundBh]

PRs have been reviewed by DevOps and are suitable for merge to uptick to the 8.1 milestone.

Reviewed together with
@pawelbaran