infra: readd truecharts

infrastructure/sources/kustomization.yaml

-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-resources:
-  - zammad.yaml
-  - calcom.yaml
-  - forgejo.yaml
-  - gitea.yaml
-  - invoiceninja.yaml
-  - robjuz.yaml
-  - vikunja.yaml
-  - 8gears.yaml
-  - minicloudlabs.yaml
-  - nemonik.yaml
-  #- truecharts.yaml