Move all @nestjs packages to peerDependencies

[queicherius]

Nest v8 no longer stringifies class names but rather uses class references to connect injectables. That means all Nest packages should be defined as peer dependencies in case you want to share them (instead of having each package with its own copy of Nest deps).

Originally posted in nestjs/nest#7568 (comment)

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Fixes #19

[MetinSeylan]

Hi @queicherius thanks for the pr, I will check it ASAP.