feat: add 13 components adapted from Oat UI

Components (.cljc + .css + tests):
- Alert (success/warning/danger/info variants)
- Badge (primary/secondary/outline/success/warning/danger)
- Card (card/card-header/card-body/card-footer)
- Accordion (collapsible with open/closed state)
- Table (headers/rows, striped/bordered variants)
- Dialog (modal with header/body/footer sections)
- Breadcrumb (nav with active item)
- Pagination (current/total with prev/next)
- Progress (value bar with color variants)
- Spinner (sm/md/lg sizes)
- Skeleton (line/box/circle/heading placeholders)
- Switch (toggle with checked/disabled states)
- Tooltip (hover text via data-tooltip attr)

CSS-only additions:
- Form elements (inputs, selects, checkboxes, radios, range, groups)
- Grid (12-column system with offsets, responsive)
- Utilities (flex, spacing, alignment, sr-only)

Also adds warning/fg-on-warning tokens to light and dark themes.
All 3 dev targets updated with full component showcase.
40 tests, 213 assertions, all passing.

test/ui/breadcrumb_test.clj

@@ -0,0 +1,37 @@
+(ns ui.breadcrumb-test
+  (:require [clojure.test :refer [deftest is testing]]
+            [ui.breadcrumb :as breadcrumb]))
+
+(deftest breadcrumb-component-test
+  (testing "renders a nav with breadcrumb list"
+    (let [result (breadcrumb/breadcrumb
+                   {:items [{:label "Home" :href "/"}
+                            {:label "Projects" :href "/projects"}
+                            {:label "Current"}]})]
+      (is (= :nav (first result)))
+      (is (= "Breadcrumb" (get-in result [1 :aria-label])))
+      ;; ol is inside
+      (let [ol (nth result 2)]
+        (is (= :ol (first ol)))
+        (is (= "breadcrumb" (get-in ol [1 :class])))
+        ;; 3 items
+        (is (= 3 (count (drop 2 ol)))))))
+
+  (testing "last item is active"
+    (let [result (breadcrumb/breadcrumb
+                   {:items [{:label "Home" :href "/"}
+                            {:label "Active"}]})
+          ol (nth result 2)
+          items (drop 2 ol)
+          last-item (last items)]
+      (is (clojure.string/includes? (get-in last-item [1 :class]) "breadcrumb-item--active")))))
+
+(deftest breadcrumb-links-test
+  (testing "non-active items have links"
+    (let [result (breadcrumb/breadcrumb
+                   {:items [{:label "Home" :href "/"}
+                            {:label "End"}]})
+          ol (nth result 2)
+          first-item (nth ol 2)]
+      ;; first item should have an anchor child
+      (is (= :a (first (nth first-item 2)))))))