Add dependency upon oojs/ui's PHP port

Depends upon Ibca93b05 in mediawiki/vendor.

Change-Id: Ibca93b05623377dc645a28ddd337027e53983552
Resources: Split oojs-ui module styling into oojs-ui.styles

Change-Id: I56e7802c58ccf546c83901382abd8fcbe370fd0a
resources: Switch OOjs UI from the 'Apex' to the 'MediaWiki' theme

Bug: T78054
Change-Id: I712b066a8cd70e1ef81a4e43e24801fe1750b3a4
Merge "Add dependency upon oojs/ui's PHP port"
Merge "Resources: Split oojs-ui module styling into oojs-ui.styles"
Merge "resources: Switch OOjs UI from the 'Apex' to the 'MediaWiki' theme"