Build the enhanced plugin page

[BenSurgisonGDS]

See https://github.com/alphagov/govuk-prototype-kit/issues/2298

Changes included:

• Change plugins page as per design and changes as requested
• Support plugin config meta data
• Add /plugins-installed route
• Add search and filter behaviour for available plugins
• Update Acceptance tests to handle separate Installed and Find Plugin pages
• Added unit tests for the new post route for search
• Cleaned up some Acceptance tests to allow them to retry correctly
• Added meta data for the jquery proxy config
• Added a proxy config for notify so meta data could be added

Changes not included:

• Pagination will be done in a separate PR

[nataliecarey]

I'm curious about the search rules...

Would users expect step by step govuk prototype kit to come up with:

Would users expect templates common to come up with:

Would users expect SMS to come up with:

These cases would be catered for if we both include the metadata in the search logic and search for each word individually rather than the complete string.

(I don't think this is necessary for a first release but I think it's worth discussing)

As this hasn't yet been exactly defined, I went with what I thought was correct for now based on the name of each plugin, not any of the meta data. What do you think @joelanman and @oli-rose28?

[nataliecarey]

If I try to access these pages offline it claims that everything has upgrades available, I think it should do the opposite and not claim that any have upgrades available. Screenshot attached.

[nataliecarey]

In the design the installed plugins also display in the "find plugins" section with a tag to say "installed". Was changing that an intentional decision?

[BenSurgisonGDS]

In the design the installed plugins also display in the "find plugins" section with a tag to say "installed". Was changing that an intentional decision?

I worked with @joelanman on this. The designs were not complete and so for an MVP, this is what we have and it can be extended later.