[meta] OpenMetrics 2.0

[bwplotka]

This issue is to globally track the development of 2.0.

Charter, comms and meeting notes: https://docs.google.com/document/d/1FCD-38Xz1-9b3ExgHOeDTQUKUatzgj5KbCND9t-abZY/edit?tab=t.6h53vr4k28b4
Project: Open Metrics 2.0 (view)

Coordinators: @bwplotka
Contributors: @RichiH @kakkoyun @ArthurSens @dashpole @vesari @krajorama @ywwg

Work has been started. Status: Requirement and Proposal gathering

[bwplotka]

Also, see How to Contribute guide.