Apply standard Go formatting and update project documentation

- Run go fmt on all Go files to ensure consistent formatting
- Add official Go tooling commands to CLAUDE.md for code quality
- Update project status to reflect current implementation state

archiver/tar.go

@@ -7,7 +7,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
-	
+
 	"github.com/atomaka/collect/collector"
 )
 
@@ -27,22 +27,22 @@ func (a *TarArchiver) Create(outputPath string, files []collector.FileEntry) err
 		return fmt.Errorf("failed to create output file: %w", err)
 	}
 	defer outFile.Close()
-	
+
 	// Create gzip writer
 	gzipWriter := gzip.NewWriter(outFile)
 	defer gzipWriter.Close()
-	
+
 	// Create tar writer
 	tarWriter := tar.NewWriter(gzipWriter)
 	defer tarWriter.Close()
-	
+
 	// Add each file to the archive
 	for _, file := range files {
 		if err := a.addFileToTar(tarWriter, file); err != nil {
 			return fmt.Errorf("failed to add file %s: %w", file.Path, err)
 		}
 	}
-	
+
 	return nil
 }
 
@@ -59,28 +59,28 @@ func (a *TarArchiver) addFileToTar(tw *tar.Writer, file collector.FileEntry) err
 		return err
 	}
 	defer f.Close()
-	
+
 	// Get file info
 	info, err := f.Stat()
 	if err != nil {
 		return err
 	}
-	
+
 	// Create tar header
 	header, err := tar.FileInfoHeader(info, "")
 	if err != nil {
 		return err
 	}
-	
+
 	// Use the relative path in the archive
 	header.Name = filepath.ToSlash(file.Path)
-	
+
 	// Write header
 	if err := tw.WriteHeader(header); err != nil {
 		return err
 	}
-	
+
 	// Copy file contents
 	_, err = io.Copy(tw, f)
 	return err
-}
+}