~eliasnaur/gio-example

ref: 8a3a65c8c0340253beaba1c2e5687a000fa74789 gio-example/tabs d---------
all: initial import

Copied from the example directory of https://git.sr.ht/~eliasnaur/gio.

Signed-off-by: Elias Naur <mail@eliasnaur.com>