model: support Ministral3 (#17644)

* conversion script

* support ministral 3

* maybe this is better?

* add TODO for rope_yarn_log_mul

* better ppl (tested on 14B-Instruct)

* Add Ministral3 support to Mistral format

* improve arch handling

* add sizes

* Apply suggestions from code review

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* nits

---------

Co-authored-by: Julien Denize <julien.denize@mistral.ai>
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

src/CMakeLists.txt

@@ -132,6 +132,7 @@ add_library(llama
             models/t5-enc.cpp
             models/wavtokenizer-dec.cpp
             models/xverse.cpp
+            models/mistral3.cpp
             models/graph-context-mamba.cpp
             )