Add install.sh public installer entrypoint

install.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ==========================================================
+# Virtuality public installer entrypoint
+# Preferred one-command install file.
+#
+# Usage:
+#   curl -fsSL https://raw.githubusercontent.com/viktor138irk/virtuality/main/install.sh | sudo bash
+# ==========================================================
+
+INSTALL_URL="${VIRTUALITY_BOOTSTRAP_URL:-https://raw.githubusercontent.com/viktor138irk/virtuality/main/bootstrap.sh}"
+
+if command -v curl >/dev/null 2>&1; then
+  curl -fsSL "$INSTALL_URL" | bash
+elif command -v wget >/dev/null 2>&1; then
+  wget -qO- "$INSTALL_URL" | bash
+else
+  echo "Ошибка: нужен curl или wget для загрузки установщика Virtuality."
+  exit 1
+fi