fix(core): add option for async logger compatibility

[mag123c]

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?

When using enableShutdownHooks(), NestJS calls process.kill(process.pid, signal) after shutdown hooks complete. This does not properly trigger the Node.js 'exit' event, which prevents async loggers like Pino (with pino.transport()) from flushing their buffered logs before the process terminates.

Issue Number: #15978

What is the new behavior?

Added a new useProcessExit option to enableShutdownHooks()

Does this PR introduce a breaking change?

• Yes
• No

[coveralls]

Pull Request Test Coverage Report for Build 2272eb36-b781-4176-b645-175ad58873a5

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 88.94%

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Totals
Change from base Build 537ec496-1cf9-4417-b343-0c068794f623:	0.001%
Covered Lines:	7326
Relevant Lines:	8237

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💛 - Coveralls