feat(sample): add hmr with esm example

[shash-hq]

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
• Other (Sample)

What is the current behavior?

Currently, there is no example showing how to configure Hot Module Replacement (HMR) in a project using ESM ("type": "module"). When users attempt to standard HMR recipe, they encounter require is not defined in ES module scope because the CLI uses require to load the webpack configuration.

Issue Number: #14331

What is the new behavior?

This PR adds sample/36-hmr-esm, which demonstrates the correct configuration for HMR with ESM:

1. Using "type": "module" in package.json.
2. Renaming the configuration file to webpack-hmr.config.cjs to allow require via CommonJS.
3. Configuring output.filename: 'main.cjs' in webpack to ensure correct runtime execution.

Does this PR introduce a breaking change?

• Yes
• No

[coveralls]

Pull Request Test Coverage Report for Build 679b9e76-c7f0-409b-804d-eb7b51a7f2d0

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 89.666%

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Totals
Change from base Build eaf9b6b0-1f07-466d-8da5-2f41241edd3c:	0.0%
Covered Lines:	7401
Relevant Lines:	8254

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💛 - Coveralls