Add option for Content Collections to access raw file content

[maximepvrt]

Description

In the current alpha version of @nuxt/content v3, it seems that hooks have been removed, and accessing the raw content of files has become impossible without them (which, to be fair, didn’t work properly in v2 either). For certain use cases, it is crucial to retrieve the raw file content before parsing it with parseMarkdown() or other custom transformations.

This feature has been a recurring request in the community, as evidenced by issues like #2803 and #2490. Adding a direct method or option to retrieve the raw file content would enhance the flexibility of the module and cater to advanced use cases.

Use Case

In my specific case, I need to process the raw file content in my page before parsing it with parseMarkdown().