feat: Update gpt4all, support multiple implementations in runtime (#472)

Signed-off-by: mudler <mudler@mocaccino.org>

pkg/assets/extract.go

@@ -0,0 +1,51 @@
+package assets
+
+import (
+	"embed"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+)
+
+func ExtractFiles(content embed.FS, extractDir string) error {
+	// Create the target directory if it doesn't exist
+	err := os.MkdirAll(extractDir, 0755)
+	if err != nil {
+		return fmt.Errorf("failed to create directory: %v", err)
+	}
+
+	// Walk through the embedded FS and extract files
+	err = fs.WalkDir(content, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		// Reconstruct the directory structure in the target directory
+		targetFile := filepath.Join(extractDir, path)
+		if d.IsDir() {
+			// Create the directory in the target directory
+			err := os.MkdirAll(targetFile, 0755)
+			if err != nil {
+				return fmt.Errorf("failed to create directory: %v", err)
+			}
+			return nil
+		}
+
+		// Read the file from the embedded FS
+		fileData, err := content.ReadFile(path)
+		if err != nil {
+			return fmt.Errorf("failed to read file: %v", err)
+		}
+
+		// Create the file in the target directory
+		err = os.WriteFile(targetFile, fileData, 0644)
+		if err != nil {
+			return fmt.Errorf("failed to write file: %v", err)
+		}
+
+		return nil
+	})
+
+	return err
+}