Pre-launch design sync with Figma spec (#2154)

* Add lookbook + viewcomponent, organize design system file

* Build menu component

* Button updates

* More button fixes

* Replace all menus with new ViewComponent

* Checkpoint: fix tests, all buttons and menus converted

* Split into Link and Button components for clarity

* Button cleanup

* Simplify custom confirmation configuration in views

* Finalize button, link component API

* Add toggle field to custom form builder + Component

* Basic tabs component

* Custom tabs, convert all menu / tab instances in app

* Gem updates

* Centralized icon helper

* Update all icon usage to central helper

* Lint fixes

* Centralize all disclosure instances

* Dialog replacements

* Consolidation of all dialog styles

* Test fixes

* Fix app layout issues, move to component with slots

* Layout simplification

* Flakey test fix

* Fix dashboard mobile issues

* Finalize homepage

* Lint fixes

* Fix shadows and borders in dark mode

* Fix tests

* Remove stale class

* Fix filled icon logic

* Move transparent? to public interface

test/components/previews/link_component_preview.rb

@@ -0,0 +1,25 @@
+class LinkComponentPreview < ViewComponent::Preview
+  # Usage
+  # -------------
+  #
+  # LinkComponent is a small abstraction on top of the `link_to` helper.
+  #
+  # It can be used as a regular link or styled as a "Link button" using any of the available ButtonComponent variants.
+  #
+  # @param variant select {{ LinkComponent::VARIANTS.keys }}
+  # @param size select {{ LinkComponent::SIZES.keys }}
+  # @param icon select ["", "plus", "arrow-right"]
+  # @param icon_position select ["left", "right"]
+  # @param full_width toggle
+  def default(variant: "default", size: "md", icon: "plus", icon_position: "left", full_width: false)
+    render LinkComponent.new(
+      href: "#",
+      text: "Preview link",
+      variant: variant,
+      size: size,
+      icon: icon,
+      icon_position: icon_position,
+      full_width: full_width
+    )
+  end
+end