feat: restructure dotfiles setup with bootstrap and setup scripts, enhance branch selection and backup processes

bootstrap.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+set -euo pipefail
+
+DOTFILES_REPO="https://gitea.purpleraft.com/ryan/dotfiles"
+DOTFILES_DIR="$HOME/.dotfiles"
+
+echo "Starting dotfiles bootstrap..."
+
+# Clone repo (new installs) or update for branch switching
+if [ -d "$DOTFILES_DIR/.git" ]; then
+    echo "Updating existing dotfiles repo..."
+    git -C "$DOTFILES_DIR" pull --quiet
+else
+    echo "Cloning dotfiles into $DOTFILES_DIR..."
+    git clone "$DOTFILES_REPO" "$DOTFILES_DIR"
+fi
+
+cd "$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
+# - Only runs in interactive terminals (skipped in automated/CI environments)
+if [ -t 0 ] && [ -t 1 ] && [ -d ".git" ]; then
+    current_branch=$(git branch --show-current 2>/dev/null || echo "unknown")
+    echo "Current branch: $current_branch"
+    
+    echo
+    read -p "Switch to a different branch? (y/N): " -n 1 -r
+    echo
+    
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        echo "Available branches:"
+        git branch -a --format="%(refname:short)" | grep -v "HEAD" | sed 's|^origin/||' | sort -u | nl -w2 -s'. '
+        
+        branches=($(git branch -a --format="%(refname:short)" | grep -v "HEAD" | sed 's|^origin/||' | sort -u))
+        
+        while true; do
+            read -p "Enter branch number (1-${#branches[@]}): " branch_num
+            
+            if [[ "$branch_num" =~ ^[0-9]+$ ]] && [ "$branch_num" -ge 1 ] && [ "$branch_num" -le "${#branches[@]}" ]; then
+                selected_branch="${branches[$((branch_num-1))]}"
+                echo "Switching to branch: $selected_branch"
+                
+                if git show-ref --verify --quiet "refs/heads/$selected_branch"; then
+                    git checkout "$selected_branch"
+                elif git show-ref --verify --quiet "refs/remotes/origin/$selected_branch"; then
+                    git checkout -b "$selected_branch" "origin/$selected_branch"
+                else
+                    echo "Error: Branch $selected_branch not found"
+                    exit 1
+                fi
+                
+                git pull --quiet || true
+                echo "Switched to branch: $selected_branch"
+                break
+            else
+                echo "Invalid selection. Please enter a number between 1 and ${#branches[@]}"
+            fi
+        done
+    fi
+fi
+
+# Hand off to setup
+if [ -f "setup.sh" ]; then
+    echo "Starting setup..."
+    exec "./setup.sh"
+else
+    echo "Error: No setup.sh found!"
+    exit 1
+fi