[BSv5] Row/col formatting breaks Docsy components

[chalin]

Formatting of rows and columns has changed in BSv5, in particular:

• There seems to be an (not-explicitly documented) assumption that a row's child is meant to be a col. And a row's child is now set at width and max-width of 100%. This breaks the layout of several components in Docsy, like blocks/* and page footer.
• Why flex-shrink 0 for all columns? twbs/bootstrap#37951

Tasks:

• Foot adjustments:
  • [BSv5] Footer fixes: reset flex-shrink, and more #1373
    We might want to rework the footer, dropping the flex-shrink fix and adding a proper row/col hierarchy.
    Nope, can't get it to work that way 🤷‍♂️ Yes, got it to work, see next item.
  • [BSv5] Footer: drop flex-shrink tweak + other adjustments #1523
• [BSv5] blocks/cover row-col hierarchy fix #1467
• [BSv5] blocks/lead row-col hierarchy fix #1469
• [BSv5] community/list row-col hierarchy fix #1471
• [BSv5] blocks/section row-col hierarchy fix #1472

[chalin]

I've searched for .row and ensured that the immediate children elements are columns. I think that all cases have been covered. The only exception is the footer, which I can't get to work other than how it was setup via #1373. Closing for now.