Initial ion commit

Created by: mgattozzi

This will be fleshed out into a fully functional shell for redox.

Do note ion was put into libredox to get it functional and separate from the terminal application. However this will be moved out when more refactoring occurs and things like orbital are moved out of it as well.

Changes to be committed: modified: filesystem/apps/terminal/terminal.rs copied: filesystem/apps/terminal/terminal.rs -> libredox/src/ion/command.rs new file: libredox/src/ion/mod.rs modified: libredox/src/lib.rs