add Gemma2 which is better for language-related prompts.

docker-compose.yml

@@ -45,7 +45,7 @@ services:
     build:
       dockerfile: src/llm_provision/Dockerfile
     environment:
-      - MODELS=qwen2.5:latest,qwen2.5-coder:32b,nomic-embed-text:latest
+      - MODELS=qwen2.5:latest,qwen2.5-coder:32b,nomic-embed-text:latest,gemma2
     restart: no
     depends_on:
       ollama:

src/aichat/roles/english-translator.md

@@ -1,5 +1,5 @@
 ---
-model: ollama:qwen2.5
+model: ollama:gemma2
 temperature: 0
 top_p: 0
 

src/aichat/roles/spell-checker.md

@@ -1,5 +1,5 @@
 ---
-model: ollama:qwen2.5
+model: ollama:gemma2
 temperature: 0
 top_p: 0