Add API endpoint for review summary

[ewhanson]

A summary of peer review elements should be available via the API to be included on the article landing page as well as displayable as a widget elsewhere. This should be a public endpoint that does not require authentication.

Required elements:

• Number of accepted/approved, revisions requested, and not approved/rejected
  • Duplicates/changed decisions should not be counted, e.g. if there are two review rounds and reviewer A accepts in round 1, that counts once. If reviewer B rejects in round 1 and round 2, that counts as rejected once. If reviewer C requests revisions in round 1 and accepts in round 2, that counts as accept.
• Total number of peer reviewed versions published
• Current version info (and date)
• Review model (open, anonymous, double anonymous)

Pull Requests

pkp-lib: #12057
ojs: pkp/ojs#5228
omp(submodule update): pkp/omp#2191
ops(submodule update): pkp/ops#1159