[Model] Add PLaMo2 (#14323)

Signed-off-by: Shinichi Hemmi <50256998+Alnusjaponica@users.noreply.github.com>
Signed-off-by: shemmi <shemmi@preferred.jp>
Co-authored-by: Kento Nozawa <nzw0301@preferred.jp>
Co-authored-by: Hiroaki Mikami <mhiroaki@preferred.jp>
Co-authored-by: Calvin Metzger <metzger@preferred.jp>

docs/source/models/supported_models.md

@@ -497,6 +497,11 @@ See [this page](#generative-models) for more information on how to use generativ
   * `adept/persimmon-8b-base`, `adept/persimmon-8b-chat`, etc.
   *
   * ✅︎
+- * `Plamo2ForCausalLM`
+  * PLaMo2
+  * `pfnet/plamo-2-1b`, `pfnet/plamo-2-8b`, etc.
+  *
+  *
 - * `QWenLMHeadModel`
   * Qwen
   * `Qwen/Qwen-7B`, `Qwen/Qwen-7B-Chat`, etc.