Node >= 20.11.0 required for import.meta.dirname
### Is your feature request related to a problem? Please describe.

When upgrading to v8, I ran into a small hiccup with an app that was using `@tsed/swagger`. In the [constants file](https://github.com/tsedio/tsed/blob/production/packages/specs/swagger/src/constants.ts#L5) there is a reference to `import.meta.dirname`. This value is only available with Node versions > v21.2.0, v20.11.0 ([reference](https://nodejs.org/api/esm.html#importmeta)). I just happened to be running Node 20.10.0 and this caused the app not to start.

### Describe the solution you'd like

Add somewhere on the docs site, maybe under https://tsed.dev/introduction/migrate-from-v7.html or https://tsed.dev/introduction/getting-started.html or note about minimum required Node versions? Maybe this already exists and I couldn't find it?

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

### Acceptance criteria

_No response_