* nongnu/packages/editors.scm (vscodium): Executable wrapper now wraps /opt/vscodium/bin/codium
this was done as the previous executable at /opt/vscodium/codium does not support command line flags
this is discussed in their vc site here: https://github.com/VSCodium/vscodium/issues/332
* nongnu/home/services/editors.scm: added <vscodium-configuration>, vscodium-service-type
added a home service which installs user: extensions, snippets, keybinds, settings
