improve OCO_AI_PROVIDER=ollama[/model name] (#327)

* 🐛 (config.ts, engine/ollama.ts, utils/engine.ts): improve Ollama AI configuration and usage
✨ (config.ts): add support for multiple Ollama models and allow users to specify the model in their config
✅ (engine/ollama.ts, utils/engine.ts): refactor code to use the specified Ollama model instead of hardcoding it

* add build results

src/commands/config.ts

@@ -82,7 +82,7 @@ export const configValidators = {
     //need api key unless running locally with ollama
     validateConfig(
       'OpenAI API_KEY',
-      value || config.OCO_ANTHROPIC_API_KEY || config.OCO_AI_PROVIDER == 'ollama' || config.OCO_AI_PROVIDER == 'test',
+      value || config.OCO_ANTHROPIC_API_KEY || config.OCO_AI_PROVIDER.startsWith('ollama') || config.OCO_AI_PROVIDER == 'test',
       'You need to provide an OpenAI/Anthropic API key'
     );
     validateConfig(
@@ -223,10 +223,9 @@ export const configValidators = {
         '',
         'openai',
         'anthropic',
-        'ollama',
         'test'
-      ].includes(value),
-      `${value} is not supported yet, use 'ollama' 'anthropic' or 'openai' (default)`
+      ].includes(value) || value.startsWith('ollama'),
+      `${value} is not supported yet, use 'ollama/{model}' 'anthropic' or 'openai' (default)`
     );
     return value;
   },