feat(plugin): add ability to define a condition to globals/collections

[thompsonsj]

Add the ability to configure a collection to only translate documents through Crowdin that meet a condition based on the document data.

Includes:

• updates to docs including restoring docs from https://github.com/thompsonsj/payload-crowdin-sync/pull/125.
• configuration of the Payload dev installation for testing with a Crowdin project.
• tabbedUI fix for the Payload dev installation.

Example

Add a checkbox field within your Payload CMS config such as:

{
  name: "translateWithCrowdin",
  type: "checkbox",
}

In your config, dictate that Crowdin translation should only occur if this checkbox is checked.

collections: [
  {
    slug: 'posts',
    condition: ({ doc }) => doc.translateWithCrowdin,
  },
]

Crowdin logic is run in an afterChange hook. The doc parameter is what is passed to this condition.