[Blueprints] Install WordPress without WP-CLI

[adamziel]

WIP

An attempt to run the WordPress installer without WP-CLI to avoid downloading a few megabytes of wp-cli.phar in WordPress Playground.

[vadimkantorov]

And even https://github.com/WordPress/sqlite-database-integration/blob/2049cf0a21fd0fa6a70e0d67678ee26eded20c57/.github/workflows/mysql-proxy-tests.yml has to use third-party GH Actions repos even to set up php and composer

It would be great to have a complete example of installing composer+WP, currently I had to use sth like this:

https://github.com/vadimkantorov/wpssg/blob/3db3c8c4a5929d88d9a9b570b10567e4a357825b/.github/workflows/publish.yml#L34-L60 :

      - name: Prerequisites
        run: |
          sudo apt install php-cli php-mysql php-dom mysql-server sqlite3 jq
          curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar

      - name: Setup WordPress
        run: |
          sudo service mysql start
          sudo mysql -h 127.0.0.1 --user=root --password=root <<< "CREATE USER 'wpssguser'@'127.0.0.1' IDENTIFIED WITH mysql_native_password BY 'wpssgpass'; CREATE DATABASE wpssgdb; GRANT ALL PRIVILEGES ON wpssgdb.* TO 'wpssguser'@'127.0.0.1';"
          sudo mysql -h 127.0.0.1 --user=wpssguser --password=wpssgpass <<< "SHOW DATABASES"

          php ./wp-cli.phar core download --locale=en_US      #--skip-content --force
          php ./wp-cli.phar config create --locale=en_US --dbuser=wpssguser --dbpass=wpssgpass --dbname=wpssgdb --dbhost=127.0.0.1
          #php ./wp-cli.phar db create # https://github.com/orgs/wp-cli/discussions/6003
          php ./wp-cli.phar core install --url=localhost:8080 --title=wpcli --admin_user=wpcli --admin_password=wpcli --admin_email=info@wp-cli.org
          php ./wp-cli.phar option set permalink_structure '/%year%-%monthnum%-%day%-%postname%/'
          
          php ./wp-cli.phar theme install --activate https://knd.te-st.ru/kandinsky.zip

      - name: Setup postmark
        run: |
          git clone https://github.com/dirtsimple/postmark
          php ./wp-cli.phar package install ./postmark