feature(redirect decorator) add redirect decorator

[johnbiundo]

PR Checklist

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• 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)

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PR Type

What kind of change does this PR introduce?

Exposes @Redirect() decorator

@Redirect(url: string, statusCode?: number)

Redirects to the specified url
If no statusCode, sends TEMPORARY_REDIRECT (307)

Method can return an object like
{ statusCode: 302, url: 'http://nestjs.com' }

which will override the decorator parameters.

[ ] Bugfix
[X] 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?
<!-- Please describe the current behavior that you are modifying, or link to a relevant issue. -->

Issue Number: N/A


## What is the new behavior?


## Does this PR introduce a breaking change?

[ ] Yes
[X] No

<!-- If this PR contains a breaking change, please describe the impact and migration path for existing applications below. -->


## Other information

Need help with two failing unit tests:

1. RouterExecutionContext createHandleResponseFn when "renderTemplate" is defined should call "res.render()" with expected args:
2. RouterExecutionContext createHandleResponseFn when "renderTemplate" is undefined should not call "res.render()":

[kamilmysliwiec]

Hey @johnbiundo! Thanks for the contribution. Could you somehow get rid of formatting changes? (Maybe run npm run format and npm run lint?)

[johnbiundo]

@kamilmysliwiec fixed the formatting changes (I hope! 😄 )

[coveralls]

Pull Request Test Coverage Report for Build 4136

• 17 of 17 (100.0%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 95.249%

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Totals
Change from base Build 4098:	0.01%
Covered Lines:	3649
Relevant Lines:	3831

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💛 - Coveralls

[kamilmysliwiec]

Why do we presume that TEMPORARY_REDIRECT should be the default one?

[johnbiundo]

@kamilmysliwiec Good catch. Both Express and Fastify default to 302 (FOUND). I always associated 302 with TEMPORARY_REDIRECT but to send a 302, it should be FOUND. Make sense?

[kamilmysliwiec]

Make sense now :)

[johnbiundo]

OK, I will switch to 302 (FOUND) and resubmit.

[johnbiundo]

@kamilmysliwiec Switched to 302 found, as discussed.

[kamilmysliwiec]

Thanks @johnbiundo! I pushed small performance improvements & merged PR to 6.6.0 branch. Could you create a PR for docs to cover this feature :)?

[johnbiundo]

@kamilmysliwiec Will do!

[johnbiundo]

@kamilmysliwiec Docs PR submitted.

[lock]

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