[PM-2452] Popover Component (#5889)

* setup popover component template and basic story

* add a11y features

* add multiple positions for the popover

* add stories for open right and left

* prevent panel from hugging edges of screen

* fix typo

* add popover arrow depending on position

* add buttons to stories

* add figma preview

* move toward directive approach

* add all positions

* add header input

* add close functionality

* make standalone component

* add a11y import

* add all stories

* add story controls/args

* add module of standalone components

* gracefully handle text wrap and align close button to top for longer headings

* update semantic html

* add story for open state

* use bitIconButton

* adjust styles

* add public close method

* setup walkthrough mode

* add walkthrough mode

* revert to before walkthrough service added

* add triggerRef to stories

* change property name

* add Escape key to close events

* add initially open state

* add docs

* minor reformatting

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Co-authored-by: William Martin <contact@willmartian.com>

libs/components/src/tw-theme.css

@@ -160,6 +160,7 @@
   --tw-ring-offset-color: #002b36;
 }
 
+@import "./popover/popover.component.css";
 @import "./search/search.component.css";
 
 /**