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/poddisruptionbudget.yaml

@@ -0,0 +1,18 @@
+{{- if .Values.podDisruptionBudget -}}
+{{- if .Capabilities.APIVersions.Has "policy/v1" }}
+apiVersion: policy/v1
+{{- else }}
+apiVersion: policy/v1beta1
+{{- end }}
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "gitea.fullname" . }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
+  labels:
+    {{- include "gitea.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "gitea.selectorLabels" . | nindent 6 }}
+  {{- toYaml .Values.podDisruptionBudget | nindent 2 }}
+{{- end -}}