Remove deprecated one-shot scripts and update first-boot configuration for improved provisioning</message>

<message>Delete obsolete one-shot scripts for setting screen rotation and wallpaper, as well as related Python and shell scripts. Update the first-boot configuration to streamline the provisioning process by removing references to these scripts. This cleanup enhances maintainability and focuses on the essential steps required for the first boot experience, ensuring a more efficient setup for users.

emmc-provisioning/cloud-init/fileserver/steps/01-hostname.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Step 01: Set hostname and /etc/hosts
+
+step_01_hostname() {
+  echo "$HOSTNAME" > /etc/hostname
+  hostnamectl set-hostname "$HOSTNAME" 2>/dev/null || true
+  if ! grep -q "127.0.1.1[[:space:]]*$HOSTNAME" /etc/hosts 2>/dev/null; then
+    sed -i "/127.0.1.1[[:space:]].*$/d" /etc/hosts
+    echo "127.0.1.1	$HOSTNAME" >> /etc/hosts
+  fi
+  log "Hostname set to $HOSTNAME"
+}