fix: enhance git pull handling in bootstrap script to manage local changes

bootstrap.sh

@@ -9,14 +9,27 @@ echo "Starting dotfiles bootstrap..."
 # Clone repo (new installs) or update for branch switching
 if [ -d "$DOTFILES_DIR/.git" ]; then
     echo "Updating existing dotfiles repo..."
-    git -C "$DOTFILES_DIR" pull --quiet
+    cd "$DOTFILES_DIR"
+    
+    # Handle local changes if they exist
+    if ! git diff-index --quiet HEAD --; then
+        echo "Local changes detected:"
+        echo "1) Discard  2) Stash  3) Abort"
+        read -p "Choice (1-3): " choice
+        case $choice in
+            1) git reset --hard HEAD ;;
+            2) git stash push -m "Bootstrap $(date +%Y%m%d-%H%M)" ;;
+            *) echo "Aborted. Check 'git status' in $DOTFILES_DIR"; exit 1 ;;
+        esac
+    fi
+    
+    git pull --quiet || { echo "Error: Failed to update repository"; exit 1; }
 else
     echo "Cloning dotfiles into $DOTFILES_DIR..."
     git clone "$DOTFILES_REPO" "$DOTFILES_DIR"
+    cd "$DOTFILES_DIR"
 fi
 
-cd "$DOTFILES_DIR"
-
 # Branch selection - allows choosing which version of dotfiles to install
 # - New installs: git clone defaults to 'main', but you can switch to any branch
 # - Existing installs: switch from current branch to a different one