Start of milestone changes for 8.1

[BHoMBot]

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

[bhombot-ci]

@BHoMBot just to let you know, I have provided a check-installer result to this Pull Request as it was detected to be linked to other Pull Requests in a series. The comment which triggered this check came from @IsakNaslundBh on BHoM

[bhombot-ci]

@BHoMBot just to let you know, I have provided a check-versioning result to this Pull Request as it was detected to be linked to other Pull Requests in a series. The comment which triggered this check came from @IsakNaslundBh on Versioning_Toolkit

[bhombot-ci]

@BHoMBot just to let you know, I have provided a check-installer result to this Pull Request as it was detected to be linked to other Pull Requests in a series. The comment which triggered this check came from @IsakNaslundBh on SQL_Toolkit

[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

[bhombot-ci]

@BHoMBot just to let you know, I have provided a check-installer result to this Pull Request as it was detected to be linked to other Pull Requests in a series. The comment which triggered this check came from @IsakNaslundBh on BHoMAnalytics_Toolkit

[bhombot-ci]

@BHoMBot just to let you know, I have provided a check-ready-to-merge result to this Pull Request as it was detected to be linked to other Pull Requests in a series. The comment which triggered this check came from @IsakNaslundBh on BHoM