[App Extensibility] Starter Extension + Clean up + Readme's (@W-17018677@)

package.json

@@ -5,10 +5,9 @@
     "bump-version": "node ./scripts/bump-version/index.js",
     "bump-version:retail-react-app": "node ./scripts/bump-version/index.js --package=@salesforce/retail-react-app",
     "bump-version:commerce-sdk-react": "node ./scripts/bump-version/index.js --package=@salesforce/commerce-sdk-react",
-    "bump-version:extension-base": "node ./scripts/bump-version/index.js --package=@salesforce/extension-base",
     "bump-version:extension-chakra-storefront": "node ./scripts/bump-version/index.js --package=@salesforce/extension-chakra-storefront",
-    "bump-version:extension-sample": "node ./scripts/bump-version/index.js --package=@salesforce/extension-sample",
     "bump-version:extension-chakra-store-locator": "node ./scripts/bump-version/index.js --package=@salesforce/extension-chakra-store-locator",
+    "bump-version:extension-starter": "node ./scripts/bump-version/index.js --package=@salesforce/extension-starter",
     "publish-to-npm": "node ./scripts/publish-to-npm.js",
     "format": "lerna run --stream format",
     "preinstall": "node ./scripts/check-version.js",

packages/extension-chakra-storefront/README.md

@@ -154,7 +154,7 @@ Please refer to the sample configuration below in order to properly configure yo
 > Downloading npm package... <br/>
 > Installing extension... <br/>
 > Finished. <br/>
-> Congratulations! The extension was successfully installed! Please visit https://www.npmjs.com/package/@salesforce/extension-sample for more information on how to use this extension.
+> Congratulations! The extension was successfully installed! Please visit https://www.npmjs.com/package/@salesforce/extension-chakra-storefront for more information on how to use this extension.
 ```
 2. Configure the extension in your base application by updating the configured "extensions" in your configuration. The config file can exist in their the `package.json`
 file under the `mobify` key or in the `config/` folder depending on how your base application is setup.