pkgatlas(kube): deploy

Flux HelmRelease tracking the CI-published chart (>=0.4.0-0, timestamped
versions, appVersion pinned to the image commit). Ingress host
pkgatlas.vhaudiquet.fr via traefik; TLS terminates at Caddy with the
*.vhaudiquet.fr wildcard, so the new @pkgatlas route proxies to Traefik
like the other public vhosts.

kubernetes/dev/pkgatlas/repository.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+    name: pkgatlas
+    namespace: pkgatlas
+spec:
+    interval: 1m
+    url: https://git.vhaudiquet.fr/api/packages/vhaudiquet/helm