feat(preprocessing): combine build_all and preprocessing

README.md

@@ -15,10 +15,18 @@ $ O={operator_name} node preprocessing.js
 To generate operator assets for showcase page
 ```
 ``` bash
+$ node preprocessing.js -a
+To generate all operator assets for showcase page
+```
+``` bash
 $ O={operator_name} node preprocessing.js -i
 To initialize folder and config file for an operator
 ```
 ``` bash
+$ node preprocessing.js -d
+To generate directory.json
+```
+``` bash
 $ O={operator_name} pnpm run dev
 Live showcase page server for development
 ```
@@ -26,10 +34,6 @@ Live showcase page server for development
 $ O={operator_name} pnpm run build
 Build showcase webpage for an operator
 ```
-``` bash
-$ node build_all.js
-Build showcase webpages for all operators
-```
 ### Webpage & JavaScript
 
 Add query string `settings` to bring up the settings panel to adjust your settings. Then use appropriate JavaScript code to load your settings