[profiles] Remove Profiles.

[renanthera]

To be merged no sooner than 12.1 in order to give consumers time to switch over.

Maintainers seem to either have a strong dislike for profiles or don't care all that much either way. Profiles do serve a purpose for tools like Bloodmallet, Liquidarmory, guide websites and possibly for others.

Rehoming them under a new repository such as simulationcraft/simc-profiles or entirely unrelated to the organization would likely be desired. I would support the former solution.

Comments are desired with regards to whether or not this PR gets merged, where profiles would end out, and potential format changes.

[renanthera]

Note, substantial work has occurred in the simulationcraft/simc-profile repository in order to support the merge of this PR as of this time.

As per discussions with Dorovon and Bloodmallet, a set of tools and rules are being fleshed out to improve contributor experience. These rules will be documented in said repository.

When preparations are more complete, this PR will be updated with changes redirecting contributors to the new repository for profiles, as well as a note in the #simulationcraft channel.

If anyone has any feedback, questions or concerns, reach out in Discord or here.

[renanthera]

New profile home has been documented in both profiles/README.md and CONTRIBUTION.md. Documentation in the simulationcraft/simc-profile repository is more complete.

As of now, this PR and the work necessary for simulationcraft/simc-profile to be usable is complete.