Prepopulate container-home with project dirs

This is to fix the problem with docker creating those directories
to mount it inside of the container-home. This only happens when
the project path is inside of $HOME which is mounted to the
.local/share/opencode-container/cantainer-home

With it like this, the empty directories are owned by the local
user and not root and it's easier to clean up in the future.

opencode-container.py

@@ -45,6 +45,14 @@ class OpenCodeContainer:
         # Ensure container home directory exists
         self.container_home_path.mkdir(parents=True, exist_ok=True)
 
+        # Pre-create project directory structure to prevent root-owned directories
+        try:
+            relative_path = self.project_path.relative_to(Path.home())
+            (self.container_home_path / relative_path).mkdir(parents=True, exist_ok=True)
+        except ValueError:
+            # Project is outside home directory - no action needed
+            pass
+
         if not self.image_exists():
             self.build_image()