Issue #2946014: Removed [Vartheme] from Varbase core code, and have it as stand-alone theme

themes/vartheme/VARTHEME_SUBTHEME/README.md

...artheme/VARTHEME_SUBTHEME/VARTHEME_SUBTHEME.libraries.yml

...rtheme/VARTHEME_SUBTHEME/VARTHEME_SUBTHEME.starterkit.yml

themes/vartheme/VARTHEME_SUBTHEME/VARTHEME_SUBTHEME.theme

themes/vartheme/VARTHEME_SUBTHEME/bootstrap-rtl/README.md

themes/vartheme/VARTHEME_SUBTHEME/bootstrap/README.md

...ME_SUBTHEME/config/install/VARTHEME_SUBTHEME.settings.yml

...onfig/optional/block.block.VARTHEME_SUBTHEME_branding.yml

...ig/optional/block.block.VARTHEME_SUBTHEME_breadcrumbs.yml

...config/optional/block.block.VARTHEME_SUBTHEME_content.yml

...nfig/optional/block.block.VARTHEME_SUBTHEME_copyright.yml

.../config/optional/block.block.VARTHEME_SUBTHEME_footer.yml

...ME/config/optional/block.block.VARTHEME_SUBTHEME_help.yml

.../optional/block.block.VARTHEME_SUBTHEME_local_actions.yml

...ig/optional/block.block.VARTHEME_SUBTHEME_local_tasks.yml

...nfig/optional/block.block.VARTHEME_SUBTHEME_main_menu.yml

...onfig/optional/block.block.VARTHEME_SUBTHEME_messages.yml

...fig/optional/block.block.VARTHEME_SUBTHEME_page_title.yml

...THEME_SUBTHEME/config/schema/VARTHEME_SUBTHEME.schema.yml

themes/vartheme/VARTHEME_SUBTHEME/css/README.md