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

[bendvc]

Description

Used #2184 as a jumping off point for this PR.

The goal of this PR is to add relevant readme's to the application extension starter project as it serves as a template for generating extensions. This helps with getting closer to "readme driven learning" for our beta program.

Types of Changes

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Documentation update
• Breaking change (could cause existing functionality to not work as expected)
• Other changes (non-breaking changes that does not fit any of the above)

Changes

• Adding various readme's for extension assets, config, etc
• Merged extension-base and extension-sample projects into one single project called extension-starter
• Updated all references to missing projects.

How to Test-Drive This PR

• The best way to test this PR is to generate an extension project using the following command:
• node packages/pwa-kit-create-app/scripts/create-mobify-app-dev.js --outputDir generated-application-extension
• Ensure you select "Application Extension" when asked.
• Once generated, ensure all the readme's added in this PR are in your resultant project.

[adamraya]

Do you want to update the references to the Sample extension with the Extension starter, including the ASCII art?

 __                       _          __      _                 _             
/ _\ __ _ _ __ ___  _ __ | | ___    /__\_  _| |_ ___ _ __  ___(_) ___  _ __  
\ \ / _` | '_ ` _ \| '_ \| |/ _ \  /_\ \ \/ / __/ _ \ '_ \/ __| |/ _ \| '_ \ 
_\ \ (_| | | | | | | |_) | |  __/ //__  >  <| ||  __/ | | \__ \ | (_) | | | |
\__/\__,_|_| |_| |_| .__/|_|\___| \__/ /_/\_\\__\___|_| |_|___/_|\___/|_| |_|
                   |_|                                                       

[bendvc]

Good call.. I'll get on that.

[adamraya]

I see a few references to "extension-sample". Do we want to update those since we removed extension-sample?

• pwa-kit/packages/pwa-kit-extension-sdk/src/configs/babel/plugin-application-extensions.test.ts

  Line 46 in a1e23ae

  installed: ['extension-sample'],

• pwa-kit/packages/pwa-kit-create-app/scripts/create-mobify-app.js

  Lines 514 to 515 in 9699350

  	['project.name']: 'app-extension-sample-extract',
  	['project.selectedAppExtensions']: ['extension-sample'],

[adamraya]

Do you want to update the "SampleExtension" class name in setup-server.ts?

pwa-kit/packages/extension-starter/src/setup-server.ts

Line 18 in 9caa1a6

class SampleExtension extends ApplicationExtension<Config> {

[bendvc]

I see a few references to "extension-sample". Do we want to update those since we removed extension-sample?

• pwa-kit/packages/pwa-kit-extension-sdk/src/configs/babel/plugin-application-extensions.test.ts

  Line 46 in a1e23ae

  installed: ['extension-sample'],

• pwa-kit/packages/pwa-kit-create-app/scripts/create-mobify-app.js

  Lines 514 to 515 in 9699350

  	['project.name']: 'app-extension-sample-extract',
  	['project.selectedAppExtensions']: ['extension-sample'],

Ahh yes.. I didn't prioritize those because they were tests and mock data. But I can update those. Thanks for being the eagle eye 🦅