add purchase order changes

[RakeshJesadiya]

Purpose of this pull request

Magento Version 2.4
This pull request (PR) improves the purchase order API and Service details. As well add grouped product requisition list details for the Magento version 2.4 only.

Affected DevDocs pages

https://devdocs.magento.com/guides/v2.4/b2b/integrations.html
https://devdocs.magento.com/guides/v2.4/b2b/bk-b2b.html

[keharper]

@RakeshJesadiya Both of the files you edited are symlinks to 2.3 files. Since these changes are for 2.4, you'll have to break the symlinks by running the follow command on both files:

rake symlink:replace_at path=src/guides/v2.4/b2b/<filename.md>

Copy your changes to the v2.4 directory then revert the v2.3 files.

Also, are you interested in writing the documentation for the new REST endpoint?

[RakeshJesadiya]

@keharper I am interested to write REST API endpoint.

[RakeshJesadiya]

@keharper @BarnyShergold I have error on breaking the symlinks by given command,

rakesh@rakesh-ThinkPad-E490:/var/www/html/devdocs$ rake symlink:replace_at path=/var/www/html/devdocs/src/guides/v2.4/b2b/integrations.md rake aborted! LoadError: cannot load such file -- html-proofer /var/www/html/devdocs/Rakefile:12:in <top (required)>'
/usr/share/rubygems-integration/all/gems/rake-13.0.1/exe/rake:27:in <top (required)>' (See full trace by running task with --trace)

Screenshot:

How Can I resolved above error?

[keharper]

@RakeshJesadiya You need to be in the devdocs root directory when you run the command. Also, the path to the file must be relative to the root directory, so it must begin with src/guides/

[RakeshJesadiya]

@keharper Please check the changes as per Version specific only.

[keharper]

running tests

[ghost]

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