"Popovers whose both title..."

Fixed minor grammatical error:

"... the best method get scroll ..."

=>

"... the best method to get scroll ..."

Corrected minor spelling error.

* Initial spike of consolidated form checks

* Stub out forms rearrangement

- Prepping to drop non-custom file and range inputs
- Prepping to merge custom and native checks and radios (with switches)
- Prepping to merge custom select with form select
- Moving docs arround so forms has it's own area given volume of CSS

* Move input group Sass file to forms subdir

* Start to split and move the docs around

* Simpler imports

* Copyediting

* delete overview file

* Remove commented out code

* remove the custom-forms import

* rewrite flex-check as form-check, replace all custom properties

* Remove old forms doc

* stub out new subpage link section

* update migration guide

* Update nav, forms overview in page nav, and descriptions

* fix check bg position

* fix margin-top calculation

* rename .custom-select to .form-select

* Update validation styles for new checks

* add some vertical margin, fix inline checks

* fix docs examples...

x-ref #28987

* Remove unused classes/styles and use utilities instead of specific styles
* Use `getElementById` instead of `querySelector`

- Add same advice about keyboard/AT handling to popovers as a callout; also add information about not adding excessive content or interactive controls (and the suggestion to opt for a modal)
- Tweak the tooltips callout for consistency

* Move close icon to components

* Remove redundant float from close

Replace snippets and examples in dropdown docs to use semantic `ul` and `li` elements.

It results in bigger files.

This reverts commit 089e3334.

- Drop hover and focus states
- Drop .badge-* variants and associated mixin for .bg-* utilities
- Drop .badge-pill for .rounded-pill utliity and adjust horizontal padding to find middle ground of .badge and old .badge-pill
- Remove unused variables
- Add default color value to .badge base class
- Update docs to reflect changes

This allows for the build to fail if a reference isn't found.

This causes `p` tags which is invalid HTML.

No more Ruby dependency and most important more than 10 times less build time (at least on Windows)!