Factored out the `Products.ZCatalog` and `Products.PluginIndexes` packages into a new `Products.ZCatalog` distribution.

avoid pre-allocating the entire sequence, which adds unnecessary overhead in most cases.  instead use a dictionary to remember the already mapped sequence items.

fix `LazyMap` to avoid unnecessary function calls when not accessing items in order (fixes http://dev.plone.org/plone/ticket/9018)

Moved subset id calculation in `OFS.OrderSupport.moveObjectsByDelta` to a new helper method, patch by Tom Gross. This allows CMFPlone and Archetypes to re-use the OFS implementation instead of using their own copy of the modified Zope 2.7 codebase :)

svn+ssh://svn.zope.org/repos/main/Zope/branches/2.12 r118262:118470

Fixes LP #628448