Add a basic way to quarantine media

config.sample.yaml

migrations/3_add_quarantine_flag_down.sql

migrations/3_add_quarantine_flag_up.sql

...hub.com/turt2live/matrix-media-repo/client/r0/download.go

...b.com/turt2live/matrix-media-repo/client/r0/quarantine.go

...ub.com/turt2live/matrix-media-repo/cmd/media_repo/main.go

src/github.com/turt2live/matrix-media-repo/config/config.go

...om/turt2live/matrix-media-repo/media_cache/media_cache.go

...urt2live/matrix-media-repo/media_cache/thumbnail_cache.go

...matrix-media-repo/services/media_service/media_service.go

...edia-repo/services/thumbnail_service/thumbnail_service.go

...turt2live/matrix-media-repo/storage/stores/media_store.go

src/github.com/turt2live/matrix-media-repo/types/media.go

...ithub.com/turt2live/matrix-media-repo/util/errs/errors.go

vendor/manifest