feat: emit batch

[gunb0s]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: #12748

What is the new behavior?

enable kafka producer to emit batch

Does this PR introduce a breaking change?

• [v] Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build d4f0316f-3bf4-4a53-b632-eebbc32fa552

Details

• 14 of 22 (63.64%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.05%) to 92.051%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/microservices/client/client-kafka.ts	14	22	63.64%

Totals
Change from base Build 7ac098a9-c60b-4faa-9612-e3dbed2e2eb6:	-0.05%
Covered Lines:	6728
Relevant Lines:	7309

---

💛 - Coveralls

[Tony133]

For the rest it seems ok 👍

[Tony133]

Suggested change

	if (packets.data.messages.length === 0) return;
	if (packets.data.messages.length === 0) {
	return;
	}

[gunb0s]

feat: add block wrapping return

[apparelmagic-heath]

Would love to see this feature merged. Very handy for our use-case.

[bozorgmehr96]

@kamilmysliwiec Is this going to be merged, and if so, do you have any estimates for when?

And another thing, are you open to batching now? You said no here, #9455
Since you green-lighted batch producing, I need batch consuming and want to know if I should also have hope for it. I might start a PR for it if I find some free time.

[binh-truong-tpv-mti]

hi all, pls consider this PR