[Feature Request]: datalink datatype support more filetype and provide more interface.

### Is there an existing issue for the same feature request?

- [x] I have checked the existing issues.

### Is your feature request related to a problem?

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### Describe the feature you'd like

Datalink datatype need to support more file types, for instance: audio files, video files , pdf, word , image. Datalink also need to provide more functions to give detail metadata of files.
desc_file() : return meta info of a file in a structure format.
unextract_file() :decompress some compressed files.

Also suggest support adding fulltext index on datalink type columns

### Describe implementation you've considered

_No response_

### Documentation, Adoption, Use Case, Migration Strategy

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### Additional information

_No response_