add script to clean nvim stuff

clean.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+set -euo pipefail
+
+TAG=.bak-$(date +%Y%m%d)
+
+SRC_DIRS=(
+  "$HOME/.local/share/nvim"
+  "$HOME/.local/state/nvim"
+  "$HOME/.cache/nvim"
+)
+
+# Show plan and confirm
+printf "This will back up and clean your Neovim directories.\n"
+printf "Backup suffix to be appended: %s\n\n" "$TAG"
+
+printf "Planned moves (only if source exists):\n"
+for SRC in "${SRC_DIRS[@]}"; do
+  DEST="${SRC}${TAG}"
+  printf "  %s -> %s\n" "$SRC" "$DEST"
+done
+
+printf "\n"
+read -r -p "Are you sure you want to proceed? [y/N]: " CONFIRM
+case ${CONFIRM:-} in
+  [yY]|[yY][eE][sS]) ;;
+  *) printf "Aborted!\n"; exit 0;;
+esac
+
+# Perform moves, skipping missing sources
+for SRC in "${SRC_DIRS[@]}"; do
+  if [ -e "$SRC" ]; then
+    DEST="${SRC}${TAG}"
+    printf "Moving %s -> %s\n" "$SRC" "$DEST"
+    mv "$SRC" "$DEST"
+  else
+    printf "Skipping missing: %s\n" "$SRC"
+  fi
+done
+
+printf "Done!"