Enable copr builds and add packit config

.packit.yaml

@@ -0,0 +1,18 @@
+downstream_package_name: scap-workbench
+jobs:
+- job: copr_build
+  metadata:
+    targets:
+    - fedora-all-x86_64
+  trigger: pull_request
+- job: propose_downstream
+  metadata:
+    dist-git-branch: fedora-all
+  trigger: release
+specfile_path: scap-workbench.spec
+synced_files:
+- scap-workbench.spec
+- .packit.yaml
+upstream_package_name: scap-workbench
+actions:
+  post-upstream-clone: wget -N https://src.fedoraproject.org/rpms/scap-workbench/raw/master/f/scap-workbench.spec