Add project files.

scripts/install.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# Install this project's own build artifacts to
+# out/install/<platform>-<arch>-<compiler>/ (INSTALL_OUTPUT_DIR in
+# Configuration.cmake; see CMakeLists.txt's install() DESTINATION paths).
+#
+# Always passes --component to `cmake --install`. Without it, any
+# vendored/fetched dependency's own install() rules (see
+# cmake/Dependencies.cmake) would also run, typically dumping files under
+# CMAKE_INSTALL_PREFIX (e.g. /usr/local) -- COMPONENT is what keeps
+# `cmake --install` scoped to just this project's own targets.
+#
+# Usage (from the project root):
+#   scripts/install.sh [BUILD_TYPE]
+#
+#   BUILD_TYPE  Debug|Release|RelWithDebInfo|MinSizeRel (default: Release) --
+#               only relevant for a Ninja Multi-Config build.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR/.."
+
+BUILD_DIR="${BUILD_DIR:-out/build}"
+BUILD_TYPE="${1:-Release}"
+COMPONENT="demo"  # must match PROJECT_CODE_NAME in CMakeLists.txt
+
+if [ ! -d "$BUILD_DIR" ]; then
+    echo "error: '${BUILD_DIR}' not found. Run scripts/build.sh first." >&2
+    exit 1
+fi
+
+echo "==> Installing (component: ${COMPONENT})"
+cmake --install "${BUILD_DIR}" --config "${BUILD_TYPE}" --component "${COMPONENT}"