The vs-make-hidden extension does not support multiple workspaces, and Peek-Hidden-Files lacks an Add File to Excluded feature. Additionally, both repositories have not been updated in quite some time. This extension combines the best features of both, with added enhancements.
Features
Hide Excluded Files, Show Excluded Files, and Toggle Excluded Files available through the Command Palette.
Add File to Excluded and Toggle Excluded Files available in the Explorer's context menu.
Known Limitations
Add File to Excluded does not work through the Command Palette; it must be used from the Explorer's context menu.
What's Next?
Add a view pane to show hidden files
Add functionality to remove items from the excluded list
Acknowledgements
This project is based on the work of the following repositories and their respective authors: