lang: core: embedded: provisioner: Add unused repo generation

I was playing around with generating repo's, but they didn't turn out to
be needed at this time. Committing this anyways for future reference.

lang/core/embedded/provisioner/files/repo.tmpl

@@ -0,0 +1,11 @@
+[{{ .name }}]
+name={{ .distro }} {{ .version }} - {{ .arch }} - {{ .extra }}
+baseurl={{ .baseurl }}
+enabled=1
+countme=1
+metadata_expire=7d
+repo_gpgcheck=0
+type=rpm
+gpgcheck=1
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-$basearch
+skip_if_unavailable=False