Enhancement: Update `create-block` templates to scaffold optional view script

Summary

The wp-create-block script from @wordpress/create-block will scaffold a viewScript by default. This may not be necessary as many blocks do not require a view script. The result is that a stale file is scaffolded and enqueued when the developer creates a block. This may require the developer to manually remove the stale file and the block.json viewScript definition.

This change introduces a prompt allowing the developer to opt-in to including a viewScript block type definition and will scaffold with the scaffolded block by prompting the developer during the Alley create-block process.

Related Issue: #602

Changes

Feature: Add a prompt for hasViewScript to determine whether a viewScript should be scaffolded.
Feature: New scaffolded view scripts if a user opts-in to a view
Bugfix: Use the blocklanguage to apply the appropriate file type to the scaffolded files.

Test Steps

Checkout this branch to test this new functionality.
Run npm install to get all of the necessary dependencies.
Navigate to the test plugin in alley-scripts, alley-scripts/plugin
Run the npm run create-block command.
You will be prompted with "Will this block have a front end view script?"
The view.ts|js file will be scaffolded to the blocks directory'
The viewScript definition will be present in the block.json file.

Additional Notes

https://developer.wordpress.org/block-editor/reference-guides/block-api/block-metadata/#view-script

alleyinteractive / alley-scripts