refac(structure): remove leading gitea directory

The following pull request removes the `gitea` directory. With regard to
maintaining act_runners in a separate git repository or helm chart, this
additional directory becomes redundant.

templates/extra-list.yaml

@@ -0,0 +1,8 @@
+{{- range .Values.extraDeploy }}
+---
+{{- if typeIs "string" . }}
+    {{- tpl . $ }}
+{{- else }}
+    {{- tpl (. | toYaml) $ }}
+{{- end }}
+{{- end }}