feat: Middleware Decorator to Resolver

[xcfox]

This PR implements #620 and a part of #200
This PR enhances @UseMiddleware() and @Authorized(), now we can put them directly on the resolver so that we can avoid repeating on each method.

Use @UseMiddleware() like so:

@UseMiddleware(resolverMiddleware1)
@UseMiddleware(resolverMiddleware2, resolverMiddleware3)
@Resolver()
class SampleResolver {
  @Query()
  @UseMiddleware(middleware1)
  @UseMiddleware(middleware2)
  normalQuery(): boolean {
    middlewareLogs.push('normalQuery')
    return true
  }
}

Middlewares will be called in the order of global, resolver, field.

Use @Authorized() like so:

@Authorized()
@Resolver()
class SampleResolver {
  @Query()
  normalQuery(): boolean {
    return true
  }
  @Authorized('ADMIN')
  @Query()
  authQuery(): boolean {
    return true
  }
}

When you set roles for both the field and the resolver, the roles will be overwritten by the field's @Authorized()

I also make a function createMiddlewareDecorator to help you create custom middlewares, it is similar to createMethodDecorator, but can be placed on resolver

[jbmikk]

@xcfox does this work with @Directive decorators too? That would be very nice.

[codecov]

Codecov Report

Attention: Patch coverage is 92.59259% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 95.40%. Comparing base (be33fd4) to head (ff00035).
Report is 28 commits behind head on master.

Files	Patch %	Lines
...corators/createResolverClassMiddlewareDecorator.ts	66.66%	2 Missing ⚠️
src/decorators/Authorized.ts	87.50%	1 Missing ⚠️
src/decorators/UseMiddleware.ts	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1297      +/-   ##
==========================================
- Coverage   95.50%   95.40%   -0.10%     
==========================================
  Files         113      114       +1     
  Lines        1847     1873      +26     
  Branches      364      328      -36     
==========================================
+ Hits         1764     1787      +23     
- Misses         83       86       +3     

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[MichalLytek]

@xcfox

• I've renamed the custom middleware decorator functions
• added changelog entries
• updated docs to reflect the changes
• adjusted examples to use resolver class scoped middleware
• added missing shim export for this new decorator function

Now it should be ready to be merged!
Thanks for your contribution! ❤️