Add v2 Text typography primitive

Implement the first v2 typography component from the Probo Radix UI
Figma: a Text primitive rendering a single span with size, weight,
align, color, and highContrast variants (color x highContrast
resolves to the sand/gold/red/green/amber/sky text step 11 or 12),
plus a paired TextSkeleton. Styling is tailwind-variants only, with
the scale shared through a variants module per the kit guides.

Stand up a theme-isolated v2 Storybook (.storybook-v2) loading the
v2 theme with a light/dark toggle, since v1 and v2 cannot share one
Tailwind build; the v1 build now excludes src/v2.

Signed-off-by: Émile Ré <emile@probo.com>

packages/ui/.storybook-v2/main.ts

@@ -0,0 +1,27 @@
+// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import type { StorybookConfig } from "@storybook/react-vite";
+
+// The v2 kit is theme-isolated from v1 (v2 wipes Tailwind's palette), so it has
+// its own Storybook build scanning only src/v2 and loading the v2 theme.
+const config: StorybookConfig = {
+  stories: ["../src/v2/**/*.stories.@(js|jsx|mjs|ts|tsx)"],
+  addons: [import.meta.resolve("@chromatic-com/storybook")],
+  framework: {
+    name: "@storybook/react-vite",
+    options: {},
+  },
+};
+export default config;