Create another block for sb-starting-block: oik-sb/second-block

[bobbingwide]

While converting oik, oik-bobbing-wide, oik-blocks, oik-css and other plugins to work correctly for multiple blocks registered from several block.json files and then to internationalize and localize, I discovered that I needed more code than originally developed for sb-starting-block.

Requirements

• sb-starting-block to deliver more than one block: oik-sb/sb-starting-block and oik-sb/second-block
• At least one should be server side registered ( oik-sb/sb-starting-block )
• Each block to be registered with block.json using apiVersion:2
• They should all be registered in the server
• And have a reasonable number of supports attributes, including color and typography.
• Each block should be internationalized, translated and localized for en_GB and bb_BB
• Consider how easy it is to rename the following when cloned from the template:
  • plugin name
  • plugin slug
  • text-domain
  • block prefix
  • prefix for server functions
• Code should be suitable for documenting the i18n / l10n approach.

Proposed solution

• Add oik-sb/second-block, originally built using npx @wordpress/create-block
• Update oik-sb/sb-starting-block
• Update sb-starting-block.php with i18n and l10n logic
• Add examples
• Change oik-sb/second-block - removing CSS and adding several supports attributes - with slightly different values from oik-sb/sb-starting-block.

[bobbingwide]

The src/README.md file is confusing. Unless you read it very carefully it's difficult to tell which npm command performs which task.
Update it then apply the changes to other plugins.

[bobbingwide]

The src/README.md was updated in f101b48, tagged as #3 not #2