Parsoid always enables `<ref>` processing, but our Cite extension
implementation tries to fetch $wgCiteResponsiveReferences, which won't
be set if the Cite extension is not installed.
Change-Id: Idde8af07e5bf40983b2ec878ebf70aabb522a800
(cherry picked from commit 0ca4ae6908b626d34f8445d9048342378d0e3c23)
This copies the Parsoid extension code into includes/VEParsoid
to allow a "one extension, zero-configuration" install of
VisualEditor for MW's LTS release. The Parsoid code has been
re-namespaced (`VEParsoid` instead of `MWParsoid`) to avoid
autoloader conflicts if you actually install Parsoid as an
extension (as we do in Wikimedia production). Similarly, we
arrange that the ServiceWiring and RestRoutes configurations
are skipped unless running in zeroconf mode, to avoid
conflicts with the Parsoid extension.
This import matches Parsoid commit b30f223.
Bug: T248343
Change-Id: Ic63ce40f59c4be8f4fdc5f9ac17798353fc86866
