add ollama support (#269)

* add ollama support

---------

Co-authored-by: di-sukharev <dim.sukharev@gmail.com>
Co-authored-by: GPT10 <57486732+di-sukharev@users.noreply.github.com>
Co-authored-by: Jaroslaw Weber <jaroslaw.weber@adriel.com>

src/utils/engine.ts

@@ -0,0 +1,13 @@
+import { AiEngine } from '../engine/Engine';
+import { api } from '../engine/openAi';
+import { getConfig } from '../commands/config';
+import { ollamaAi } from '../engine/ollama';
+
+export function getEngine(): AiEngine {
+  const config = getConfig();
+  if (config?.OCO_AI_PROVIDER == 'ollama') {
+    return ollamaAi;
+  }
+  //open ai gpt by default
+  return api;
+}