~eliasnaur/gio-example

ref: be08aa68a96a19dd7cb1998da5ba750df03da3f1 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>