feat(infra): Meet integration, La Suite theming, Pingora SSH + meet routes

Meet: add backend/frontend/celery deployments and services, meet-config
ConfigMap, nginx SPA config, VSO secrets (meet-db-credentials VDS,
meet-django-secret and meet-livekit VSS). Wire oidc-meet OAuth2Client.

La Suite overlay discipline: move people/docs frontend nginx ConfigMaps
and patches from overlays/local to base so both environments share them.
Remove values-ory.yaml (folded into base). Add docs-frontend nginx config
with sub_filter theming. Add local gitea mkcert CA patch.

Pingora: add [ssh] TCP passthrough block (port 22 → Gitea SSH pod) and
split meet route into frontend default + backend paths for /api/, /admin/,
/oidc/, /static/, /__. Remove now-unused values-pingora.yaml from production
overlay (host ports moved to patch-pingora-hostport.yaml).

Update both overlay kustomizations to reference all new resources and
add meet-backend/meet-frontend image entries.

base/lasuite/people-frontend-nginx-configmap.yaml

@@ -0,0 +1,44 @@
+# nginx config for people-frontend that rewrites the hardcoded production
+# integration URL baked into the desk static Next.js build.
+#
+# sub_filter rewrites integration.lasuite.numerique.gouv.fr → integration.DOMAIN_SUFFIX
+# so the gaufre.js widget and services.json come from our own integration service.
+# gzip must be off for sub_filter to work on JS responses.
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: people-frontend-nginx-conf
+  namespace: lasuite
+data:
+  default.conf: |
+    server {
+      listen 3000;
+      listen 8080;
+      server_name localhost;
+      server_tokens off;
+
+      root /usr/share/nginx/html;
+
+      gzip off;
+      sub_filter 'integration.lasuite.numerique.gouv.fr' 'integration.DOMAIN_SUFFIX';
+      sub_filter '</head>' '<link rel="preconnect" href="https://fonts.googleapis.com"><link rel="preconnect" href="https://fonts.gstatic.com" crossorigin><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Ysabeau+Variable:ital,wght@0,100..900;1,100..900&display=swap"><link rel="stylesheet" href="https://integration.DOMAIN_SUFFIX/api/v2/theme.css"></head>';
+      sub_filter_once off;
+      sub_filter_types text/html application/javascript;
+
+      location / {
+          try_files $uri index.html $uri/ =404;
+      }
+
+      location /teams/ {
+        error_page 404 /teams/[id]/;
+      }
+
+      location /mail-domains/ {
+        error_page 404 /mail-domains/[slug]/;
+      }
+
+      error_page 404 /404.html;
+      location = /404.html {
+          internal;
+      }
+    }