feat: Add OpenRouter provider and models

Author: twilwa

core/src/core/models.ts

@@ -9,10 +9,27 @@ type Models = {
     [ModelProvider.LLAMALOCAL]: Model;
     [ModelProvider.GOOGLE]: Model;
     [ModelProvider.CLAUDE_VERTEX]: Model;
-    // TODO: add OpenRouter - feel free to do this :)
+    [ModelProvider.OPENROUTER]: Model;
 };
 
 const models: Models = {
+    [ModelProvider.OPENROUTER]: {
+        endpoint: "https://openrouter.ai/api/v1",
+        settings: {
+            stop: [],
+            maxInputTokens: 128000,
+            maxOutputTokens: 4096,
+            frequency_penalty: 0.0,
+            presence_penalty: 0.0,
+            temperature: 0.7,
+        },
+        model: {
+            [ModelClass.SMALL]: "mistralai/mistral-7b-instruct",
+            [ModelClass.MEDIUM]: "anthropic/claude-2",
+            [ModelClass.LARGE]: "anthropic/claude-2", 
+            [ModelClass.EMBEDDING]: "openai/text-embedding-ada-002",
+        },
+    },
     [ModelProvider.OPENAI]: {
         endpoint: "https://api.openai.com/v1",
         settings: {