Classic themes: tutorial on moving away from widgets to template parts

[annezazu]

Pulling out of this GitHub issue and thinking about the future of patterns & template parts, including exposing patterns for classic themes in 6.6, I think we need a blog post talking about how classic theme authors should move to include template parts instead of adding entity based blocks to widget sidebars.

I'd see this as a part tutorial and part announcement/encouragement. I think a lot of material could be reused and it could include information about the future of exposing patterns and why that's a more viable pathway with classic themes, including for template parts.

[bph]

This topic was approved 5/2/24 and conversation continues on the issue

• Classic themes: tutorial on moving away from widgets to template parts #259