feat: Implement OpenRouter model discovery and endpoints

- Added OpenRouterModelDiscovery class for managing model listings and metadata resolution.
- Introduced OpenRouterModelEndpointsResponse and OpenRouterModelsResponse classes for handling API responses.
- Created OpenRouterModelQuery class to encapsulate query parameters for model listing.
- Updated ModelProfile to include OPENROUTER as a model provider.
- Enhanced ModelProfileService to handle default values for maxTokens and maxContextLength.
- Added OpenRouterClientTest for testing model discovery and chat completion functionalities.
- Configured application-test.properties and local-openrouter-chatcompletion.properties for OpenRouter integration.

src/main/java/de/extio/lmlib/client/ClientAutoConfiguration.java

@@ -6,6 +6,8 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
 
+import de.extio.lmlib.client.openrouter.OpenRouterClient;
+import de.extio.lmlib.client.openrouter.OpenRouterModelDiscovery;
 import de.extio.lmlib.client.ollama.OllamaClient;
 import de.extio.lmlib.client.oai.completion.chat.ChatCompletionClient;
 import de.extio.lmlib.client.oai.completion.text.TextCompletionClient;
@@ -35,6 +37,18 @@ public class ClientAutoConfiguration {
 		return new ChatCompletionClient();
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	OpenRouterModelDiscovery openRouterModelDiscovery() {
+		return new OpenRouterModelDiscovery();
+	}
+
+	@Bean
+	@ConditionalOnMissingBean
+	OpenRouterClient openRouterClient() {
+		return new OpenRouterClient();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	OllamaClient ollamaClient() {