[Documentation] Adding Playground CLI page and removing wp-now references

[fellyph]

Motivation for the change, related issues

Due to the deprecation of the wp-now and the rollout of the new playground CLI(#2224). This pull request updates the references from wp-now to @wp-playground/cli and creates a new page showing how to use the new playground CLI.

Implementation details

• Updating the main README file
• Adding a deprecation notice on wp-now page
• Creating the new Playground CLI page
• Updating Local Development, Contributor Day, Build and Theme/Plugins for developers pages.

Testing Instructions (or ideally a Blueprint)

• Download the branch adding-playground-cli-page
• Install the dependencies
• Run the command npm run dev:docs

[adamziel]

Nice! Just noticing we'll need to coordinate updating this with merging #2281 as that will break some CLI BC.

[adamziel]

Nice! Thank you @fellyph. Good direction, I've just left some notes. Btw, are we duplicating the CLI readme with that page? I wonder if there's a way to symlink one to the other perhaps? Or would you say they're distinct?

[bgrgicak]

Is there something in Docusaurus that would enable us to auto-generate this section? I'm concerned about it getting outdated.

[adamziel]

It seems like there are some build failures

[fellyph]

@adamziel I have updated the branch, let's see if the CI passes now.

[adamziel]

It seems like there's still a missing image error

[adamziel]

When I go to the build job failure details and scroll all the way down, the error says:

  [ERROR] Client bundle compiled with errors therefore further build is impossible.
  Error: MDX compilation failed for file "/home/runner/work/wordpress-playground/wordpress-playground/packages/docs/site/docs/developers/05-local-development/04-wp-playground-cli.md"
  Cause: Image docs/developers/05-local-development/_assets/npx-wp-playground-server.gif used in docs/developers/05-local-development/04-wp-playground-cli.md not found.
  Details:
  Error: Image docs/developers/05-local-development/_assets/npx-wp-playground-server.gif used in docs/developers/05-local-development/04-wp-playground-cli.md not found.
      at async Promise.all (index 0)

The relative path used in packages/docs/site/docs/developers/05-local-development/04-wp-playground-cli.md says ./_assets/npx-wp-playground-server.gif and is pointing to a non-existent file. The actual asset is in ../../blueprints/_assets/npx-wp-playground-server.gif.

[fellyph]

I have fixed the image address and fixed the issue.

[fellyph]

I have removed wp-now from the documentation sidebar: