Allow configuring starting dir

src/ProcessManager.ts

@@ -25,10 +25,14 @@ export class ProcessManager {
     this.onStateChange = onStateChange;
   }
 
-  updateSettings(settings: OpenCodeSettings) {
+  updateSettings(settings: OpenCodeSettings): void {
     this.settings = settings;
   }
 
+  updateProjectDirectory(directory: string): void {
+    this.projectDirectory = directory;
+  }
+
   getState(): ProcessState {
     return this.state;
   }