chore: Move the bundle tool to .github/tools/bundle.sh

Update its repo-root path and all references (workflow, README, AGENTS.md).

.github/tools/bundle.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+# Build a single-file version of the wizard for `curl | bash` use:
+#   .github/tools/bundle.sh [output]      (default: dist/setup-gamescope-boot.sh)
+#
+# Inlines lib/*.sh in the order setup-gamescope-boot.sh sources them and
+# wraps the entry point's body in main(), so bash has read the whole file
+# before anything runs. That lets the bundle reattach stdin to the terminal
+# when it was piped in by curl, so the interactive menu still works.
+set -euo pipefail
+cd "$(dirname "$0")/../.."
+
+out="${1:-dist/setup-gamescope-boot.sh}"
+entry=setup-gamescope-boot.sh
+mkdir -p "$(dirname "$out")"
+
+# Library order, taken from the entry point's source loop.
+libs=$(grep -oP '^for lib in \K.*(?=; do$)' "$entry")
+[[ -n "$libs" ]] || { echo "bundle: can't find the lib source loop in $entry" >&2; exit 1; }
+
+version="v$(grep -oP '^VERSION=\K.*' "$entry"), $(git describe --always --dirty 2>/dev/null || echo unknown)"
+
+{
+    # Header comment and `set` line of the entry point, up to the source loop.
+    sed -n '1,/^SCRIPT_DIR=/p' "$entry" | sed '$d'
+    echo "# Single-file build ($version), generated by .github/tools/bundle.sh - edit the"
+    echo "# sources in the repository instead: https://github.com/theupriser/cachyos-gamescope-boot"
+    echo
+    for lib in $libs; do
+        echo "# ----- lib/$lib.sh -----"
+        # Drop each module's shebang and its "Sourced by ..." boilerplate.
+        sed -e '1{/^#!/d}' -e '/^# Sourced by setup-gamescope-boot.sh/d' "lib/$lib.sh"
+        echo
+    done
+    echo "# ----- setup-gamescope-boot.sh -----"
+    echo "main() {"
+    # Everything after the source loop is the entry point's body.
+    sed -n '/^for lib in /,$p' "$entry" | sed '1,/^done$/d' | sed 's/^/    /; s/^    $//'
+    echo "}"
+    echo
+    echo "# Piped in via curl, bash reads this very file from stdin. Give the menu"
+    echo "# the terminal instead - on the same line as main and exit: bash has read"
+    echo "# this line in full, so it never reads further script from the terminal."
+    echo 'reattach_tty() { if [[ ! -t 0 && -z "${WIZARD_KEEP_STDIN:-}" ]]; then { exec </dev/tty; } 2>/dev/null || true; fi; }'
+    echo 'reattach_tty; main "$@"; exit $?'
+} > "$out"
+
+chmod +x "$out"
+bash -n "$out"
+echo "Wrote $out ($version)"