Add Portal to scowiki

Add a Portal namespace with it's talk page to scowiki

Bug: 66107
Change-Id: I1931084b81040defacb55fa046f1608c8dd33660
Add otherProjects for kowiki

Enable kowikisource, kowikiquote and commonswiki as otherProjects
for kowiki using Wikibase.

Bug: 66128
Change-Id: Ib1cc7cf7e3456e0f9df609830f158ffcce8ed6d1
Merge "Add otherProjects for kowiki"
Merge "Add Portal to scowiki"