Add Immich install script

This currently only supports CPU machine-learning; CUDA and OpenVINO
will come later.

ct/headers/immich

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+    ____                    _      __
+   /  _/___ ___  ____ ___  (_)____/ /_
+   / // __ `__ \/ __ `__ \/ / ___/ __ \
+ _/ // / / / / / / / / / / / /__/ / / /
+/___/_/ /_/ /_/_/ /_/ /_/_/\___/_/ /_/
+

ct/immich.sh

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+#!/usr/bin/env bash
+source <(curl -s https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: vhsdream
+# License: MIT | https://github.com/community-scripts/ProxmoxVED/raw/main/LICENSE
+# Source: https://immich.app
+
+APP="immich"
+var_tags="${var_tags:-photos}"
+var_disk="${var_disk:-12}"
+var_cpu="${var_cpu:-4}"
+var_ram="${var_ram:-4096}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-12}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+  if [[ ! -d /opt/immich ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+  msg_error "Currently we don't provide an update function for ${APP}."
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:2283${CL}"