feat(api): 🎉 Add business profile and catalog management

* Implement endpoints for managing business profiles:
  - Get business profile
  - Update business profile

* Add catalog management features:
  - List catalogs
  - List products in a catalog
  - Send catalog messages
  - Send single product messages
  - Send product list messages

* Introduce media upload functionality for sending media files.

* Add flow management capabilities:
  - Deprecate flows

* Update API documentation to reflect new endpoints and features.

pkg/whatsapp/businessapi/media.go

@@ -10,6 +10,12 @@ import (
 	"net/http"
 )
 
+// UploadMedia uploads a media file to Meta and returns the media ID.
+// Useful for pre-uploading media before referencing it in a later send call.
+func (c *Client) UploadMedia(ctx context.Context, data []byte, mimeType string) (string, error) {
+	return c.uploadMedia(ctx, data, mimeType)
+}
+
 // uploadMedia uploads media to the Business API and returns the media ID
 func (c *Client) uploadMedia(ctx context.Context, data []byte, mimeType string) (string, error) {
 	url := fmt.Sprintf("https://graph.facebook.com/%s/%s/media",