Deploy to webassembly

[anilbey]

Figure out how to enable the file picker on browser

[anilbey]

The file picker works async on WASM just like in here: https://github.com/woelper/egui_pick_file

The hdf5 crate however depends on C bindings. That does not compile to WASM. There is no pure rust hdf5 crate as of today.