feat: add Runtipi addon + upgrade all addons with Proxmox host check, optional Docker install, Alpine support

- New: tools/addon/runtipi.sh with full Alpine support (gcompat for musl)
- New: tools/headers/runtipi ASCII header
- Updated: runtipi.json to addon type with null resources
- Removed: ct/runtipi.sh, install/runtipi-install.sh (migrated to addon)
- All addons (dockge, komodo, dokploy, coolify, runtipi) now have:
  - check_proxmox_host(): warns when running on PVE host, default N
  - check_or_install_docker(): optional Docker install (Debian+Alpine)
  - Alpine-aware curl bootstrap and dependency installation

install/runtipi-install.sh

@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright (c) 2021-2026 tteck
-# Author: tteck (tteckster)
-# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
-# Source: https://runtipi.io/
-
-source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
-color
-verb_ip6
-catch_errors
-setting_up_container
-network_check
-update_os
-
-msg_warn "WARNING: This script will run an external installer from a third-party source (https://runtipi.io/)."
-msg_warn "The following code is NOT maintained or audited by our repository."
-msg_warn "If you have any doubts or concerns, please review the installer code before proceeding:"
-msg_custom "${TAB3}${GATEWAY}${BGN}${CL}" "\e[1;34m" "→  https://raw.githubusercontent.com/runtipi/runtipi/master/scripts/install.sh"
-echo
-read -r -p "${TAB3}Do you want to continue? [y/N]: " CONFIRM
-if [[ ! "$CONFIRM" =~ ^([yY][eE][sS]|[yY])$ ]]; then
-  msg_error "Aborted by user. No changes have been made."
-  exit 10
-fi
-
-msg_info "Installing Runtipi (Patience)"
-DOCKER_CONFIG_PATH='/etc/docker/daemon.json'
-mkdir -p "$(dirname "$DOCKER_CONFIG_PATH")"
-echo -e '{\n  "log-driver": "journald"\n}' >"$DOCKER_CONFIG_PATH"
-cd /opt
-curl -fsSL "https://raw.githubusercontent.com/runtipi/runtipi/master/scripts/install.sh" -o "install.sh"
-chmod +x install.sh
-$STD ./install.sh
-chmod 666 /opt/runtipi/state/settings.json
-rm -f /opt/install.sh
-msg_ok "Installed Runtipi"
-
-motd_ssh
-customize
-cleanup_lxc