Replacing 'mediawiki.ui/variables.less' `@import`
with new skin-aware 'mediawiki.skin.variables.less' standard.
Also replacing and removing scattered WikimediaUI Base variables
with new skin variables.
Also
- replacing several static values with new Codex design tokens featuring
skin variables for following properties:
- `background-color`
- `color`
- `border*`
- `border-radius`
- replacing local variables with new skin variables where applicable.
Bump required MediaWiki core version to >= v1.41.0.
Bug: T319381
Bug: T332541
Co-Authored-by: Volker E. <volker.e@wikimedia.org>
Depends-On: I04f9e48a1cf9dee915cf51e1e12b17ff0a595a06
Change-Id: Ie834b3f652bd22d9bf96c112166a5b7fcc3ecf2d
Amending Base10 to slightly darker `#202122` to fulfill WCAG
requirements in connection to Accent50.
Also adding it as WikimediaUI Base equivalent variable for
future replacement.
Also removing variables not in use any more.
Bug: T248393
Change-Id: I6fb5c288cfeb2bd3c786c2f5ab771074203b8fc0
Renaming 'mmv.globals.less' to 'mmv.variables.less' following naming
pattern of other extensions like MobileFrontend, Echo or Flow.
Change-Id: I376c3fd1463ed225e214f165943576f3e3c7df39
