refactor: rename fabric_code tool to code_helper for clarity

## CHANGES

- Rename tool from `fabric_code` to `code_helper`
- Update all documentation references to the tool
- Update installation instructions in README
- Modify usage examples in documentation
- Update tool's self-description and help text

plugins/tools/code_helper/main.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	// Define command line flags
+	maxDepth := flag.Int("depth", 3, "Maximum directory depth to scan")
+	ignorePatterns := flag.String("ignore", ".git,node_modules,vendor", "Comma-separated patterns to ignore")
+	outputFile := flag.String("out", "", "Output file (default: stdout)")
+	showHelp := flag.Bool("help", false, "Show help message")
+
+	// Parse command line flags
+	flag.Parse()
+
+	// Show help if requested or no arguments provided
+	if *showHelp || flag.NArg() < 1 {
+		printUsage()
+		os.Exit(0)
+	}
+
+	// Get directory and instructions from positional arguments
+	directory := flag.Arg(0)
+	instructions := ""
+	if flag.NArg() > 1 {
+		instructions = flag.Arg(1)
+	}
+
+	// Validate directory
+	if _, err := os.Stat(directory); os.IsNotExist(err) {
+		fmt.Fprintf(os.Stderr, "Error: Directory '%s' does not exist\n", directory)
+		os.Exit(1)
+	}
+	// Parse ignore patterns
+	ignoreList := ParseIgnorePatterns(*ignorePatterns)
+
+	// Scan directory and generate JSON
+	var jsonData []byte
+	var err error
+	jsonData, err = ScanDirectory(directory, *maxDepth, instructions, ignoreList)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Write output
+	if *outputFile != "" {
+		if err := os.WriteFile(*outputFile, jsonData, 0644); err != nil {
+			fmt.Fprintf(os.Stderr, "Error writing to file: %v\n", err)
+			os.Exit(1)
+		}
+	} else {
+		fmt.Print(string(jsonData))
+	}
+}
+
+// ParseIgnorePatterns converts a comma-separated string of patterns to a slice
+func ParseIgnorePatterns(patterns string) []string {
+	if patterns == "" {
+		return nil
+	}
+	return strings.Split(patterns, ",")
+}
+
+func printUsage() {
+	fmt.Println(`code_helper - Code project scanner for use with Fabric AI
+
+Usage:
+  code_helper [options] <directory> [instructions]
+
+Examples:
+  # Scan current directory with instructions
+  code_helper . "Add input validation to all user inputs"
+
+  # Scan specific directory with depth limit
+  code_helper -depth 4 ./my-project "Implement error handling"
+
+  # Output to file instead of stdout
+  code_helper -out project.json ./src "Fix security issues"
+
+Options:`)
+	flag.PrintDefaults()
+}