🧭 v0.10.2 — Breadcrumbs, Iconable, and Dropdown Polish

What Was Added

Breadcrumb components — Three new components for navigation trails:

• BreadcrumbComponent — single crumb with title, path, icon, current state, and five variants
• BreadcrumbDropdownComponent — a crumb that opens a dropdown inline within a trail
• BreadcrumbsComponent — container accepting raw hashes, ActiveModel classes, or ActiveModel instances; variant inherited by all child crumbs automatically

Midwest::Iconable — Opt-in model concern that lets any ActiveModel class declare a canonical icon via icon :name. Inherited by subclasses, and automatically used when passing Iconable models to midwest_breadcrumbs.

DropdownMenuComponent — New component encapsulating the dropdown menu shell, with align and computed options.

HasDropdownMenu internal concern — Extracted to internal/has_dropdown_menu.rb; provides renders_many :items and indicator option to any component hosting a dropdown.

Iconable documentation — Added 02_iconable.md.erb to the Rails features docs.

What Changed

• DropdownComponent updated to use HasDropdownMenu and the new DropdownMenuComponent shell.
• DropdownItemComponent refactored — template and styles updated.
• Dropdown CSS overhauled: alignment variants promoted to the new menu component, nested positioning improved.
• view_helper.rb updated to expose the new breadcrumb helpers.

What Was Removed

• Two items removed from COMPONENT_AUDIT.md (breadcrumb entries marked done).
• Redundant Tailwind CSS utility removed from midwest.tailwind.css.

Dev Process

• New system tests added for breadcrumb, breadcrumb dropdown, breadcrumbs, dropdown alignment, and as_types previews.
• New unit tests for all new components and concerns (111+ assertions in the Iconable suite alone).