nheko: add Nheko

Qt based messanger. Untrimmed, brotli compressed.

Reference: mesa/mesa#6355

Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <gfx-ci/tracie/traces-db!41>
3 jobs for add_ror in 2 minutes and 16 seconds (queued for 2 seconds)