refactor(oci): remove the shell entry point nothing runs

`oci/proxmenux-oci.sh` was installed on every Proxmox host and used on
none of them. The menu entry goes straight to the orchestrator:
scripts/oci/oci_manager_apps.sh runs `python3 -m proxmenux_oci` with
PYTHONPATH pointing at the engine.

Its only remaining caller was a message telling the reader to open it on
the Proxmox host — which is not how anyone gets in, and is what sent one
there to run it. That message now names the menu entry.

It could not be fetched and run either: it needs requirements.txt and
src/ beside it, so `wget | bash` resolved its own directory to the
working directory and failed on a path nobody chose. Making that work
would mean writing a second installer next to the one that already
ships the engine.

What it did offer was a virtualenv for a contributor generating the
catalog. The README now gives the direct invocation and names the two
distribution packages it needs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

lang/de.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Diese Installation wird:",
   "This installer will:": "Dieses Installationsprogramm wird:",
   "This interface is configured but doesn't exist physically": "Diese Schnittstelle ist konfiguriert, aber physisch nicht vorhanden",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Diese Schnittstelle läuft auf dem Proxmox-Knoten als root. Öffnen Sie proxmenux-oci.sh auf dem Proxmox-Host.",
   "This is IRREVERSIBLE.": "Das ist irreversibel.",
   "This is a destructive action": "Dies ist eine destruktive Aktion",
   "This is a simple configuration change": "Dies ist eine einfache Konfigurationsänderung",

lang/es.json

@@ -6209,7 +6209,7 @@
   "This installation will:": "Esta instalación:",
   "This installer will:": "Este instalador:",
   "This interface is configured but doesn't exist physically": "Esta interfaz está configurada pero no existe físicamente.",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Esta interfaz se ejecuta en el nodo Proxmox como root. Abre proxmenux-oci.sh en el host Proxmox.",
+  "This interface runs on the Proxmox node as root. Open OCI manager Apps from the ProxMenux menu on the Proxmox host.": "Esta interfaz se ejecuta en el nodo Proxmox como root. Abre OCI manager Apps desde el menú de ProxMenux en el host Proxmox.",
   "This is IRREVERSIBLE.": "Esto es IRREVERSIBLE.",
   "This is a destructive action": "Esta es una acción destructiva.",
   "This is a simple configuration change": "Este es un cambio de configuración simple.",

lang/fr.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Cette installation va :",
   "This installer will:": "Ce programme d'installation va :",
   "This interface is configured but doesn't exist physically": "Cette interface est configurée mais n'existe pas physiquement",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Cette interface fonctionne sur le nœud Proxmox comme racine. Ouvrez proxmenux-oci.sh sur l'hôte Proxmox.",
   "This is IRREVERSIBLE.": "C’est IRRÉVERSIBLE.",
   "This is a destructive action": "Il s’agit d’une action destructrice",
   "This is a simple configuration change": "Il s'agit d'un simple changement de configuration",

lang/it.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Questa installazione:",
   "This installer will:": "Questo programma di installazione:",
   "This interface is configured but doesn't exist physically": "Questa interfaccia è configurata ma non esiste fisicamente",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Questa interfaccia funziona sul nodo Proxmox come root. Aprire proxmenux-oci.sh sull'host Proxmox.",
   "This is IRREVERSIBLE.": "questo è IRREVERSIBILE.",
   "This is a destructive action": "Questa è un'azione distruttiva",
   "This is a simple configuration change": "Si tratta di una semplice modifica della configurazione",

lang/pt.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Esta instalação irá:",
   "This installer will:": "Este instalador irá:",
   "This interface is configured but doesn't exist physically": "Esta interface está configurada, mas não existe fisicamente",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Esta interface é executada no nó Proxmox como root. Abra proxmenux-oci.sh no host Proxmox.",
   "This is IRREVERSIBLE.": "Isso é IRREVERSÍVEL.",
   "This is a destructive action": "Esta é uma ação destrutiva",
   "This is a simple configuration change": "Esta é uma simples mudança de configuração",

lang/sk.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Táto inštalácia urobí toto:",
   "This installer will:": "Tento inštalátor urobí toto:",
   "This interface is configured but doesn't exist physically": "Toto rozhranie je nastavené, ale fyzicky neexistuje",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Toto rozhranie beží na uzle Proxmox ako koreň. Otvorte proxmenux-oci.sh na hostiteľovi Proxmox.",
   "This is IRREVERSIBLE.": "Toto je NEVRATNÉ.",
   "This is a destructive action": "Toto je deštruktívna akcia",
   "This is a simple configuration change": "Ide o jednoduchú zmenu nastavenia",

lang/sv.json

@@ -6209,7 +6209,6 @@
   "This installation will:": "Denna installation kommer att:",
   "This installer will:": "Detta installationsprogram kommer att:",
   "This interface is configured but doesn't exist physically": "Detta gränssnitt är konfigurerat men existerar inte fysiskt",
-  "This interface runs on the Proxmox node as root. Open proxmenux-oci.sh on the Proxmox host.": "Detta gränssnitt körs på Proxmox-noden som rot. Öppna proxmenux-oci.sh på Proxmox-värden.",
   "This is IRREVERSIBLE.": "Detta är IRREVERSIBELT.",
   "This is a destructive action": "Detta är en destruktiv handling",
   "This is a simple configuration change": "Detta är en enkel konfigurationsändring",