Feature/add export command

[dsawardekar]

Description of the Change

This PR adds a new WP_CLI export command to generate an export of the Block Catalog in CSV format.

  wp block-catalog export

DESCRIPTION

  Exports the posts associated with the 'block_catalog' taxonomy to a CSV file.

SYNOPSIS

  wp block-catalog export [--output=<output>] [--post_type=<types>] [--posts_per_block=<number>] [--ignore_parent=<ignore_parent>]

OPTIONS

  [--output=<output>]
    Path to the CSV file. Defaults to /tmp/block-catalog.csv

  [--post_type=<types>]
    Comma-delimited list of post types. Optional.

  [--posts_per_block=<number>]
    Number of posts per block, default to -1 (all). Optional.

  [--ignore_parent=<ignore_parent>]
    Ignore top level blocks. Optional. Default true

Generated CSV,

block_name	block_slug	post_id	post_type	post_title	permalink	status
Paragraph	core-paragraph	1	post	Hello world!	http://block-catalog.test/2023/11/23/hello-world/	publish
Paragraph	core-paragraph	2	page	Sample Page	http://block-catalog.test/sample-page/	publish
Quote	core-quote	2	page	Sample Page	http://block-catalog.test/sample-page/	publish

How to test the Change

Run the WP_CLI export command. It should iterate over the catalog and generate an output CSV.

$ wp block-catalog export --output=test.csv && less test.csv

Changelog Entry

Added - Export command to generate a CSV of the block catalog.

Credits

Props @dsawardekar, @psorensen

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[Sidsector9]

The code looks good, only a minot bug:

The error message is printed as success.

[dsawardekar]

@Sidsector9 Good catch, fixed here,

2ff418d