New Script: Proxmox Mail Gateway (#1906)

* Proxmox Mail Gateway LXC

* improvements

* renamed to long name and added install check

* Update proxmox-mail-gateway.sh

* Update proxmox-mail-gateway.sh

* Update proxmox-mail-gateway.json

* Update proxmox-mail-gateway-install.sh

* Update proxmox-mail-gateway.sh

* Update proxmox-mail-gateway.sh

* Update proxmox-mail-gateway-install.sh

---------

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

json/proxmox-mail-gateway.json

@@ -0,0 +1,39 @@
+{
+    "name": "Promox Mail Gateway",
+    "slug": "proxmox-mail-gateway",
+    "categories": [
+            1
+    ],
+    "date_created": "2025-02-04",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 8006,
+    "documentation": "https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html",
+    "website": "https://www.proxmox.com/en/products/proxmox-mail-gateway/overview",
+    "logo": "https://raw.githubusercontent.com/home-assistant/brands/master/core_integrations/proxmoxve/icon.png",
+    "description": "Proxmox Mail Gateway is the leading open-source email security solution helping you to protect your mail server against all email threats from the moment they emerge.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/proxmox-mail-gateway.sh",
+            "resources": {
+                "cpu": 2,
+                "ram": 4096,
+                "hdd": 10,
+                "os": "debian",
+                "version": "12"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": "root",
+        "password": null
+    },
+    "notes": [
+        {
+        "text": "Set a root password if using autologin. This will be the PMG password. `passwd root`",
+        "type": "warning"
+        }
+    ]
+}