feat(code): add /code:clean command for project cleanup (#100)

Add cleanup command to remove generated files:
- Clears cache directories (storage/framework/cache, bootstrap/cache)
- Removes build artifacts (public/build, public/hot)
- Optional --deps flag to remove vendor/node_modules
- --cache flag for cache-only cleanup
- --dry-run for safe preview

Migrated from core-claude PR #45.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

claude/code/commands/clean.md

@@ -0,0 +1,24 @@
+---
+name: clean
+description: Clean up generated files, caches, and build artifacts.
+args: "[--deps] [--cache] [--dry-run]"
+---
+
+# Clean Project
+
+This command cleans up generated files from the current project.
+
+## Usage
+
+```
+/code:clean                   # Clean all
+/code:clean --deps            # Remove vendor/node_modules
+/code:clean --cache           # Clear caches only
+/code:clean --dry-run         # Show what would be deleted
+```
+
+## Action
+
+```bash
+"${CLAUDE_PLUGIN_ROOT}/scripts/cleanup.sh" "$@"
+```

claude/code/scripts/cleanup.sh

@@ -0,0 +1,135 @@
+#!/bin/bash
+
+# Default options
+CLEAN_DEPS=false
+CLEAN_CACHE_ONLY=false
+DRY_RUN=false
+
+# Parse arguments
+for arg in "$@"
+do
+    case $arg in
+        --deps)
+        CLEAN_DEPS=true
+        shift
+        ;;
+        --cache)
+        CLEAN_CACHE_ONLY=true
+        shift
+        ;;
+        --dry-run)
+        DRY_RUN=true
+        shift
+        ;;
+    esac
+done
+
+# --- Configuration ---
+CACHE_PATHS=(
+  "storage/framework/cache/*"
+  "bootstrap/cache/*"
+  ".phpunit.cache"
+)
+
+BUILD_PATHS=(
+  "public/build/*"
+  "public/hot"
+)
+
+DEP_PATHS=(
+  "vendor"
+  "node_modules"
+)
+
+# --- Logic ---
+total_freed=0
+
+delete_path() {
+  local path_pattern=$1
+  local size_bytes=0
+  local size_human=""
+
+  # Use a subshell to avoid affecting the main script's globbing settings
+  (
+    shopt -s nullglob
+    local files=( $path_pattern )
+
+    if [ ${#files[@]} -eq 0 ]; then
+        return # No files matched the glob
+    fi
+
+    # Calculate total size for all matched files
+    for file in "${files[@]}"; do
+        if [ -e "$file" ]; then
+            size_bytes=$((size_bytes + $(du -sb "$file" | cut -f1)))
+        fi
+    done
+  )
+
+  total_freed=$((total_freed + size_bytes))
+  size_human=$(echo "$size_bytes" | awk '{
+      if ($1 >= 1024*1024*1024) { printf "%.2f GB", $1/(1024*1024*1024) }
+      else if ($1 >= 1024*1024) { printf "%.2f MB", $1/(1024*1024) }
+      else if ($1 >= 1024) { printf "%.2f KB", $1/1024 }
+      else { printf "%d Bytes", $1 }
+  }')
+
+
+  if [ "$DRY_RUN" = true ]; then
+    echo "  ✓ (dry run) $path_pattern ($size_human)"
+  else
+    # Suppress "no such file or directory" errors if glob doesn't match anything
+    rm -rf $path_pattern 2>/dev/null
+    echo "  ✓ $path_pattern ($size_human)"
+  fi
+}
+
+
+echo "Cleaning project..."
+echo ""
+
+if [ "$CLEAN_CACHE_ONLY" = true ]; then
+  echo "Cache:"
+  for path in "${CACHE_PATHS[@]}"; do
+    delete_path "$path"
+  done
+else
+  echo "Cache:"
+  for path in "${CACHE_PATHS[@]}"; do
+    delete_path "$path"
+  done
+  echo ""
+  echo "Build:"
+  for path in "${BUILD_PATHS[@]}"; do
+    delete_path "$path"
+  done
+fi
+
+if [ "$CLEAN_DEPS" = true ]; then
+  if [ "$DRY_RUN" = false ]; then
+    echo ""
+    read -p "Delete vendor/ and node_modules/? [y/N] " -n 1 -r
+    echo ""
+    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        echo "Aborted."
+        exit 1
+    fi
+  fi
+  echo ""
+  echo "Dependencies (--deps):"
+  for path in "${DEP_PATHS[@]}"; do
+    delete_path "$path"
+  done
+fi
+
+# Final summary
+if [ "$total_freed" -gt 0 ]; then
+    total_freed_human=$(echo "$total_freed" | awk '{
+        if ($1 >= 1024*1024*1024) { printf "%.2f GB", $1/(1024*1024*1024) }
+        else if ($1 >= 1024*1024) { printf "%.2f MB", $1/(1024*1024) }
+        else if ($1 >= 1024) { printf "%.2f KB", $1/1024 }
+        else { printf "%d Bytes", $1 }
+    }')
+    echo ""
+    echo "Total freed: $total_freed_human"
+fi