Add pipeline & library name tags

Hello!

## Preface
This is very promising, wow. I'm looking forward to the report! Nice work integrating this with ST natively.

## Pull Request overview
* Add `pipeline_tag` as feature-extraction, i.e. embedding creation
* Add `tags` for sentence-transformers and transformers, so this model also shows up when filtering for those

## Details
These tags should make it easier for this to be found.

- Tom Aarsen

README.md

@@ -7,6 +7,10 @@ language:
 - en
 base_model:
 - answerdotai/ModernBERT-large
+pipeline_tag: feature-extraction
+tags:
+- sentence-transformers
+- transformers
 ---
 ## 1 Introduction