feat: add zALLMATCHSCAN

[McPatate]

• Add zALLMATCHSCAN command.
• Refactored the decoder as ClamAV can output multiple \0 terminated lines.
• Also added a check that clamd is running on cargo test to improve dev exp.

Note that I will rebase #4 once it's merged so that this PR contains only the last commit 740e442

[McPatate]

I've realised that there must be some issue in the parsing of the stream. After a few commands when .keep_alive(true), the client goes into error. Looking into it

[McPatate]

Very strange, tests pass on my machine. Could you check if tests also work for you @LevitatingOrange ?

[LevitatingOrange]

Very strange, tests pass on my machine. Could you check if tests also work for you @LevitatingOrange ?

Yeah weird, they pass on my machine too.

[McPatate]

@LevitatingOrange do you have some time to review ? It works nicely in production.

I was wondering, do we want to deduplicate when ClamAV reports the same signature multiple times?

EDIT: regarding ^, now that I think of it, it may be useless/annoying to do once we switch to Vec<ScanResult>. If it were only strings, we could easily just do HashSet<String>, but with ScanResults I wonder if this makes sense. We should let the user do his own thing if he wants to dedup signatures, wdyt?