Function clearPyodideCache

Clear the Pyodide package cache for BOTH native and webview notebooks.

• Native notebooks: Deletes ~/.cache/datalayer-pyodide/ (packages) AND globalStorage/pyodide/ (old core files)
• Webview notebooks: Reloads webviews to clear IndexedDB cache This removes all downloaded Python packages and old Pyodide core files, forcing them to be re-downloaded on next use.