refactor/internal (#1216)

* refactor: update import paths in gateway handlers

* refactor: remove obsolete devtools Makefile and README

* build: optimize build process for improved efficiency

* refactor: remove obsolete pkl files related to Matrix and Sonr network configurations

* refactor: move embed code to x/dwn/types

internal/common/ipfs_folder.go

@@ -0,0 +1,21 @@
+package common
+
+import (
+	"context"
+
+	"github.com/ipfs/boxo/files"
+)
+
+type Folder = files.Directory
+
+func NewFolder(fs ...File) Folder {
+	return files.NewMapDirectory(NewFileMap(fs))
+}
+
+func (c *client) AddFolder(folder Folder) (string, error) {
+	cidFile, err := c.api.Unixfs().Add(context.Background(), folder)
+	if err != nil {
+		return "", err
+	}
+	return cidFile.String(), nil
+}