Add Nvembed v2 model (#2649)

* Update mod.rs

* Create mod.rs

* Create decoder.rs

* Create model.rs

* Create main.rs

* Create README.md

* Update README.md

* Update main.rs

* Update and rename decoder.rs to embedding.rs

* Update mod.rs

* Update model.rs

candle-transformers/src/models/mod.rs

@@ -62,6 +62,7 @@ pub mod mobilenetv4;
 pub mod mobileone;
 pub mod moondream;
 pub mod mpt;
+pub mod nvembed_v2;
 pub mod olmo;
 pub mod openclip;
 pub mod paligemma;