chore(deps): upgrade to express v5, fastify v5, add legacy route path converter

[kamilmysliwiec]

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PR Checklist

Please check if your PR fulfills the following requirements:

• [x] 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)
• [x] 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
• [x] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• [x] Yes
• [ ] No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 0a814cf0-29c6-4dee-8874-62bc2189010f

Details

• 31 of 42 (73.81%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 89.757%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/core/middleware/utils.ts	7	10	70.0%
packages/core/router/legacy-route-converter.ts	17	21	80.95%
packages/core/router/router-explorer.ts	6	10	60.0%
<!--	Total:	31	42

Totals
Change from base Build cab6d4a2-2a29-4d37-84b8-35b7d0e3fb15:	-0.1%
Covered Lines:	7098
Relevant Lines:	7908

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💛 - Coveralls

[cwebb612]

@kamilmysliwiec Does this unblock: https://github.com/nestjs/serve-static/issues/1513#issuecomment-2505828287 ? Thank you