fix: Simplify extension folder name (#38690)

docs/developer_docs/extensions/development.md

@@ -49,7 +49,7 @@ superset-extensions update: Updates derived and generated files in the extension
 When creating a new extension with `superset-extensions init`, the CLI generates a standardized folder structure:
 
 ```
-my-org.dataset-references/
+dataset-references/
 ├── extension.json
 ├── frontend/
 │   ├── src/
@@ -80,7 +80,7 @@ my-org.dataset-references/
 ```
 
 **Note**: With publisher `my-org` and name `dataset-references`, the technical names are:
-- Directory name: `my-org.dataset-references` (kebab-case)
+- Directory name: `dataset-references` (kebab-case)
 - Backend Python namespace: `my_org.dataset_references`
 - Backend distribution package: `my_org-dataset_references`
 - Frontend package name: `@my-org/dataset-references` (scoped)

docs/developer_docs/extensions/quick-start.md

@@ -75,7 +75,7 @@ This approach ensures that extensions from different organizations cannot confli
 This creates a complete project structure:
 
 ```
-my-org.hello-world/
+hello-world/
 ├── extension.json           # Extension metadata and configuration
 ├── backend/                 # Backend Python code
 │   ├── src/