Adapta el instalador a archinstall 4.3 y arregla paru/helpwire

- disk_config: archinstall 4.3 cambió el schema (exige sector_size, sin
  unidad Percent). Nuevo shared/gen-disk-config.py genera el layout con los
  modelos de archinstall, dimensionado al disco real; ambos setup.sh lo
  invocan y se quita el disk_config 3.0 muerto de los JSON.
- paru: compilar de fuente, no paru-bin (su binario enlaza contra una
  libalpm.so concreta y rompe si la del sistema nuevo difiere).
- rustup default stable antes de compilar paru (si no, no hay cargo).
- helpwire: debtap nombra el paquete 'helpwire', no 'helpwire-operator';
  convertir en dir limpio e instalar el único .zst.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

kde/archinstall-config.json

@@ -3,7 +3,9 @@
   "archinstall-language": "Spanish",
   "bootloader": "Grub",
   "hostname": "arch-kde",
-  "kernels": ["linux"],
+  "kernels": [
+    "linux"
+  ],
   "ntp": true,
   "swap": true,
   "timezone": "Europe/Madrid",
@@ -13,67 +15,31 @@
     "sys_lang": "es_ES.UTF-8"
   },
   "mirror_config": {
-    "mirror_regions": { "Spain": [] }
+    "mirror_regions": {
+      "Spain": []
+    }
+  },
+  "network_config": {
+    "type": "nm"
+  },
+  "audio_config": {
+    "audio": "pipewire"
   },
-  "network_config": { "type": "nm" },
-  "audio_config": { "audio": "pipewire" },
   "profile_config": {
     "gfx_driver": "All open-source",
     "greeter": "sddm",
-    "profile": { "main": "Desktop", "details": ["KDE Plasma"] }
+    "profile": {
+      "main": "Desktop",
+      "details": [
+        "KDE Plasma"
+      ]
+    }
   },
-  "packages": ["networkmanager", "git", "sudo", "vim", "curl"],
-  "disk_config": {
-    "config_type": "manual_partitioning",
-    "device_modifications": [
-      {
-        "device": "/dev/nvme0n1",
-        "wipe": true,
-        "partitions": [
-          {
-            "type": "primary",
-            "status": "create",
-            "fs_type": "fat32",
-            "mountpoint": "/boot/efi",
-            "start": { "unit": "MiB", "value": 1 },
-            "size": { "unit": "MiB", "value": 512 },
-            "flags": ["boot", "esp"]
-          },
-          {
-            "type": "primary",
-            "status": "create",
-            "fs_type": "ext4",
-            "mountpoint": "/boot",
-            "start": { "unit": "MiB", "value": 513 },
-            "size": { "unit": "GiB", "value": 1 },
-            "flags": []
-          },
-          {
-            "type": "primary",
-            "status": "create",
-            "fs_type": "btrfs",
-            "mountpoint": "/",
-            "start": { "unit": "GiB", "value": 2 },
-            "size": { "unit": "Percent", "value": 100 },
-            "flags": []
-          }
-        ]
-      },
-      {
-        "device": "/dev/sda",
-        "wipe": true,
-        "partitions": [
-          {
-            "type": "primary",
-            "status": "create",
-            "fs_type": "ext4",
-            "mountpoint": "/home",
-            "start": { "unit": "MiB", "value": 1 },
-            "size": { "unit": "Percent", "value": 100 },
-            "flags": []
-          }
-        ]
-      }
-    ]
-  }
-}
+  "packages": [
+    "networkmanager",
+    "git",
+    "sudo",
+    "vim",
+    "curl"
+  ]
+}