feat: support user topics when handling custom operation #6662

Job	Run time
Block fixup commits	10s
Check whether Cargo.lock is up to date	18s
Shellcheck	7s
Filter changes	4s
Spell Check with Typos	5s
Run format checks	5m 20s
Run cargo clippy	56s
Run cargo audit	9s
Run cargo test	8m 19s
Run cargo check on MSRV	37s
Sort dependencies	2m 1s
nightly / doc	43s
Check markdown	0s
Check for unused dependencies	1m 28s
	20m 17s

Provide feedback