Changelog: fixed

The What's new app is a singleton. Rather than creating an element which
we search for in the Vue App, then pass to the What's New App
initializer, we just create our own div. This probably can be refactored
in favor of something more Vue-y but for now it seems like a good
compromise.

We don't need to trigger the whats new app from the legacy top nav any
longer. This allows us to simplify the init code in the super sidebar.

While we are at it, we are sneaking in a little rename of
`whats-new-app` to `js-whats-new-app`. Also, we are now passing the
version digest from the super sidebar, rather than reading it from the
DOM attributes.

Remove `DROPDOWN_X_OFFSET` const applied to `crossAxis`
Update tests

Removes the "Ask GitLab Chat" item from the super sidebar's help center
in favor of a "GitLab AI" button in the breadcrumbs container.

As part of Vue 3 migration
overriding method behavior and
direct data manipulation
should be avoided

Changelog: changed

GitLab UI dropdowns don't expose a `popperOptions` prop anymore. It has
been replaced with `dropdownOffset` which only controls the dropdown's
offsets relative to its reference elements. This migrates existing
usages of the deprecated prop to the new one.

Concat URLs in correct file.

* Extract domain name and exported in the url utility file.
* Update URLs with domain name and promo URL.
* Update test cases against the new changes.

- Missed a reference in Error message
- Feedback for help menu item

This change renames the
Tanuki Bot in the UI
to GitLab Chat while the
naming gets finalized and
approved.

This change initializes the GlDrawer
that will be used to house the
Tanuki Bot.

This is an attempt at MVC and breaking
down the changes into reviewable chunks.

This change is the setup MR
to add the Tanuki Bot UI
elements to the Help Nav.

This is an attempt at MVC
to keep the reviews moving
quickly.

Applies the necessary offset for the "Create" and user menu dropdowns to
be aligned with the super sidebar.

The help button was added in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/109385, but it
wasn't working on certain pages, specifically those listed in
~/behaviors/shortcuts.js.

This removes the global function defined on pages other than those
listed above. Instead, we now rely on event delegation in the Shortcuts
class for detecting the clicks to the shortcuts modal trigger, since the
sidebar might not be in the DOM by the time the Shortcuts constructor
(or some subclass of it) is called.

Same logic as in the current header nav help dropdown.

New disclosure should have all the links from the current help menu.