Update for WordPress 5.8 compatibility

[bobbingwide]

The oik-magnetic-poetry plugin was originally built using webpack.

When used in WordPress 5.8 the Widget block editor produces a "doing it wrong" message due to the enqueueing of wp-editor.
It seems the best solution is to rework the code to build it using wp-scripts which will enable use of

import ServerSideRender from '@wordpress/server-side-render';

See bobbingwide/bobbingwide#30 (comment)

Requirements

• Ability to use the Widget block editor without getting messages regarding wp-editor.
• Which means changing the build to allow the import above.
• Build using wp-scripts
• Register the block using block.json
• Ensure the block can be selected
• Add some color and typography settings similar to UK tides
• Add text align capability

Proposed solution

• Copy and cobble the solution developed for UK-tides v3.0.0, as this is now ahead of sb-starting-block
• Remove unnecessary files: webpack.config.js and .babelrc
• Change package.json and block.json for oik-mp/magnetic-poetry
• Change oik-magnetic-poetry/index.js to register the block from block.json
• Change oik-magnetic-poetry/index.js to add logic for text align
• Change oik-magnetic-poetry.php to register the block from block.json
• Change oik-magnetic-poetry.php to use get_block_wrapper_attributes()
• Update node_modules and rebuild

Process for updating node_modules

1. Remove the existing node_modules folder
2. npm install
3. npm install @wordpress/scripts --save-dev

See https://developer.wordpress.org/block-editor/reference-guides/packages/packages-scripts/

This worked first time! In the next plugin just 1. and 2. or 1. and 3. and see if the build works

[bobbingwide]

[bobbingwide]

The block's now been refactored. Before closing the issue I need to dot the i's and cross the t's... delivering the new version on oik-plugins and updating the documentation.

[bobbingwide]

Oops. the transform from Verse doesn't work since createBlock's not being imported.

[bobbingwide]

I should also complete the internationalization and localization.
See bobbingwide/sb-post-edit-block#5 (comment)

[bobbingwide]

oik-magnetic-poetry v0.2.2 is now available from oik-plugins.com.
Closing therefore.