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.

src/ui/tooltip.cljc

@@ -0,0 +1,25 @@
+(ns ui.tooltip
+  (:require [clojure.string :as str]))
+
+(defn tooltip
+  "Render a tooltip wrapper. Shows tooltip text on hover.
+
+   Props:
+     :text  - tooltip text to display
+     :class - additional CSS classes
+     :attrs - additional HTML attributes"
+  [{:keys [text class attrs] :as _props} & children]
+  #?(:squint
+     (let [classes (cond-> "tooltip" class (str " " class))
+           base-attrs (merge {:class classes :data-tooltip text} attrs)]
+       (into [:span base-attrs] children))
+
+     :cljs
+     (let [cls (cond-> ["tooltip"] class (conj class))
+           base-attrs (merge {:class cls :data-tooltip text} attrs)]
+       (into [:span base-attrs] children))
+
+     :clj
+     (let [classes (cond-> "tooltip" class (str " " class))
+           base-attrs (merge {:class classes :data-tooltip text} attrs)]
+       (into [:span base-attrs] children))))