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/dialog.css

@@ -0,0 +1,59 @@
+.dialog {
+  position: fixed;
+  inset: 0;
+  z-index: 50;
+  width: min(100% - 2rem, 32rem);
+  max-height: 85vh;
+  margin: auto;
+  padding: 0;
+  background: var(--bg-1);
+  border: var(--border-0);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-3);
+  overflow: hidden;
+}
+
+.dialog[open] {
+  display: flex;
+  flex-direction: column;
+}
+
+.dialog::backdrop {
+  background: rgba(0, 0, 0, 0.5);
+}
+
+.dialog-header {
+  display: flex;
+  flex-direction: column;
+  gap: var(--size-1);
+  padding: var(--size-6);
+  padding-bottom: 0;
+}
+
+.dialog-header h1,
+.dialog-header h2,
+.dialog-header h3,
+.dialog-header h4,
+.dialog-header h5,
+.dialog-header h6 {
+  margin: 0;
+}
+
+.dialog-header p {
+  font-size: var(--font-sm);
+  color: var(--fg-2);
+  margin: 0;
+}
+
+.dialog-body {
+  padding: var(--size-6);
+  overflow-y: auto;
+}
+
+.dialog-footer {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--size-2);
+  padding: var(--size-6);
+  padding-top: 0;
+}