Style v2 with tailwind-variants/lite

The numbered v2 token scales (text-1…9, rounded-1…6, shadow-1…6)
share a prefix with the color/utility namespaces, and tailwind-merge
(which tailwind-variants runs by default) cannot tell a numeric
text-3 from a color step, so it silently dropped the size whenever a
text-<color> was present. Switch the v2 kit to the merge-free
tailwind-variants/lite entrypoint (added in v3): upgrade
tailwind-variants to ^3.2.2, import tv/VariantProps from
tailwind-variants/lite in the typography primitives, and drop the
per-call twMerge:false.

The legacy v1 kit stays on tailwind-variants (merge intact). Document
the rationale in ui.md and add a packages/ui/src/v2 ESLint guard that
forbids tailwind-variants, tailwind-merge, and clsx.

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

package-lock.json

@@ -18989,29 +18989,22 @@
       }
     },
     "node_modules/tailwind-variants": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/tailwind-variants/-/tailwind-variants-1.0.0.tgz",
-      "integrity": "sha512-2WSbv4ulEEyuBKomOunut65D8UZwxrHoRfYnxGcQNnHqlSCp2+B7Yz2W+yrNDrxRodOXtGD/1oCcKGNBnUqMqA==",
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/tailwind-variants/-/tailwind-variants-3.2.2.tgz",
+      "integrity": "sha512-Mi4kHeMTLvKlM98XPnK+7HoBPmf4gygdFmqQPaDivc3DpYS6aIY6KiG/PgThrGvii5YZJqRsPz0aPyhoFzmZgg==",
       "license": "MIT",
-      "dependencies": {
-        "tailwind-merge": "3.0.2"
-      },
       "engines": {
         "node": ">=16.x",
         "pnpm": ">=7.x"
       },
       "peerDependencies": {
+        "tailwind-merge": ">=3.0.0",
         "tailwindcss": "*"
-      }
-    },
-    "node_modules/tailwind-variants/node_modules/tailwind-merge": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/tailwind-merge/-/tailwind-merge-3.0.2.tgz",
-      "integrity": "sha512-l7z+OYZ7mu3DTqrL88RiKrKIqO3NcpEO8V/Od04bNpvk0kiIFndGEoqfuzvj4yuhRkHKjRkII2z+KS2HfPcSxw==",
-      "license": "MIT",
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/dcastil"
+      },
+      "peerDependenciesMeta": {
+        "tailwind-merge": {
+          "optional": true
+        }
       }
     },
     "node_modules/tailwindcss": {
@@ -21497,7 +21490,7 @@
         "rehype-raw": "^7.0.0",
         "remark-gfm": "^4.0.1",
         "tailwind-merge": "^3.4.0",
-        "tailwind-variants": "^1.0.0",
+        "tailwind-variants": "^3.2.2",
         "tailwindcss": "^4.3.1",
         "tw-animate-css": "^1.3.0",
         "zustand": "^5.0.4"