archivers/brotli: Move and update to 0.6.0

• Move from devel/libbrotli to archivers/brotli
• Remove meta-project for library build
• Bump epoch for meta 1.0 to upstream 0.6 update
• Add MOVED entry
• Switch from autoconf to cmake

PR: 218813, 218851
Submitted by: Markus Kohlmeyer <rootservice@gmail.com>
Approved by: maintainer time-out
Differential Revision: https://reviews.freebsd.org/D11290