[Toolkit][Shadcn] Add menubar and popover recipes

[Amoifr]

Q	A
Bug fix?	no
New feature?	yes
Deprecations?	no
Documentation?	no
Issues	Part of #3233
License	MIT

Hi 👋

Two more recipes from #3233 (previous batches: #3464, #3466, #3467). Both are JS-free and rely on native CSS / HTML behaviour:

• menubar — horizontal menu bar with hover/focus-triggered dropdowns. Same group/menubar-menu + group-hover / group-focus-within pattern as hover-card ([Toolkit][Shadcn] Add native-select, slider, scroll-area and hover-card recipes #3466) and navigation-menu ([Toolkit][Shadcn] Add input-otp, resizable and navigation-menu recipes #3467). Ships with Menu, Trigger, Content, Item, and Separator sub-components.
• popover — click-triggered popup backed by native <details> / <summary>. Ships with Popover:Trigger (a styled <summary>) and Popover:Content.

Each recipe has Usage.html.twig, Demo.html.twig, and passing snapshot tests (252 tests, 504 assertions).

Thanks! 🙏

[Kocal]

Can you change the base branch to 3.x please, the 2.x is not maintained anymore.

Thanks!

Status: Needs work

[github-actions]

📊 Packages dist files size difference

Thanks for the PR! Here is the difference in size of the packages dist files between the base branch and the PR.
Please review the changes and make sure they are expected.

File	Before (Size / Gzip)	After (Size / Gzip)
LazyImage
controller.d.ts	395 B / 257 B	Removed
controller.js	904 B / 457 B	Removed
Map
abstract_map_controller.d.ts	7.6 kB / 1.49 kB	7.29 kB-4% 📉 / 1.46 kB-2% 📉
abstract_map_controller.js	4.92 kB / 1.4 kB	4.65 kB-5% 📉 / 1.26 kB-10% 📉
Map (Bridge Google)
map_controller.d.ts	10.56 kB / 1.92 kB	10.26 kB-3% 📉 / 1.9 kB-1% 📉
map_controller.js	12.9 kB / 3.19 kB	11.25 kB-13% 📉 / 2.84 kB-11% 📉
Map (Bridge Leaflet)
map_controller.d.ts	9.92 kB / 1.84 kB	9.61 kB-3% 📉 / 1.81 kB-2% 📉
map_controller.js	12.45 kB / 3.36 kB	11.38 kB-9% 📉 / 3.17 kB-6% 📉
Svelte
components.d.ts	200 B / 150 B	Removed
components.js	46 B / 69 B	Removed
loader.d.ts	435 B / 217 B	Removed
loader.js	553 B / 313 B	Removed
register_controller.d.ts	384 B / 235 B	Removed
register_controller.js	531 B / 303 B	Removed
render_controller.d.ts	629 B / 353 B	Removed
render_controller.js	1.05 kB / 493 B	Removed
Swup
controller.d.ts	1012 B / 360 B	Removed
controller.js	1.71 kB / 653 B	Removed
TogglePassword
controller.d.ts	896 B / 355 B	Removed
controller.js	2.64 kB / 1.07 kB	Removed
style.min.css	312 B / 218 B	Removed
Typed
controller.d.ts	1.9 kB / 501 B	Removed
controller.js	1.8 kB / 638 B	Removed

[Amoifr]

Sorry about this — rebased onto 3.x and moved the CHANGELOG entries into the 3.0.0 section. I'd already been reminded about this on a previous PR and still wasn't careful enough on this batch. Thanks for the patience! 🙏

[Amoifr]

Closing in favor of one PR per component (easier to review): #3486 (menubar), #3487 (popover).