* add missing properties

list of new properties:
align-content
animation-fill-mode
appearance
column-count
column-fill
column-gap
column-rule
column-rule-color
column-rule-style
column-rule-width
column-span
column-width
columns
direction
fill
flex-shrink
orphans
page-break-after
page-break-before
page-break-inside
perspective
src
stroke
unicode-bidi
widows

* fix invalid JSON config

add curly brackets

* Update .stylelintrc

* Remove clip-path from .sr-only utility as it causes perf regressions in Chrome

* change snippet to example

* set color to `.form-control-plaintext`
* fixes readability on dark themes like ‘darkly’
  * https://bootswatch.com/darkly/index.html#forms
  * https://bootswatch.com/slate/index.html#forms
  * https://bootswatch.com/superhero/index.html#superhero
  * https://bootswatch.com/solar/index.html#forms

/cc @thomaspark

* Add note about insert position of "map-remove"

* Use optional keys instead of required keys

* use $input-bg for $custom-select-bg

This checks if all variables are `!default`.

Clarify migration docs to remove mention of .table-responsive being for the parent element vs the table element itself (#25539)

Fixes #25413

* Prevent focus into closed offcanvas

- Fixes typo with "with at" in "horizontal with at the small breakpoint"

* Move helpful code comments

* Add .carousel-fade option to Sass

* Document example of the fade carousel

* more logical warning of the .active class on carousel items

* Add .dropdown-item-text class

* Add example of plain text within a .dropdown-menu, too

* reorganize, simple/clearer headings

Currently bootstrap only provides 4 variations of `width` and `height` css utilities, which are:

1. 25%
2. 50%
3. 75%
4. 100%.

Here, I'm adding `auto` to the list. This is useful when we need to reset the width/height value
back to the browser default value at some point.

Closes #25313

Less on 2 symbols

Merge branch 'borderless-table' of https://github.com/Varunram/bootstrap into Varunram-borderless-table