v0.3.1 - Add 11 new style variations (4 light, 4 dark + 3 earlier dark)

Add Rose, Sand, Lavender, Mint (light) and Ember, Arctic, Amethyst,
Slate, Mocha, Nebula, Obsidian (dark) color palettes for the Design
Editor. Total of 15 style variations available (7 light, 7 dark).

Co-Authored-By: Claude <noreply@anthropic.com>

styles/15-obsidian.json

@@ -0,0 +1,86 @@
+{
+    "$schema": "https://schemas.wp.org/wp/6.7/theme.json",
+    "version": 3,
+    "title": "Obsidian",
+    "settings": {
+        "color": {
+            "palette": [
+                {
+                    "color": "#121212",
+                    "name": "Base",
+                    "slug": "base"
+                },
+                {
+                    "color": "#e0e0e0",
+                    "name": "Contrast",
+                    "slug": "contrast"
+                },
+                {
+                    "color": "#ef4444",
+                    "name": "Primary",
+                    "slug": "primary"
+                },
+                {
+                    "color": "#a3a3a3",
+                    "name": "Secondary",
+                    "slug": "secondary"
+                },
+                {
+                    "color": "#4ade80",
+                    "name": "Success",
+                    "slug": "success"
+                },
+                {
+                    "color": "#fb7185",
+                    "name": "Danger",
+                    "slug": "danger"
+                },
+                {
+                    "color": "#fbbf24",
+                    "name": "Warning",
+                    "slug": "warning"
+                },
+                {
+                    "color": "#f97316",
+                    "name": "Info",
+                    "slug": "info"
+                },
+                {
+                    "color": "#1a1a1a",
+                    "name": "Light",
+                    "slug": "light"
+                },
+                {
+                    "color": "#2a2a2a",
+                    "name": "Dark",
+                    "slug": "dark"
+                }
+            ]
+        }
+    },
+    "styles": {
+        "elements": {
+            "button": {
+                "color": {
+                    "background": "var:preset|color|primary",
+                    "text": "var:preset|color|base"
+                },
+                ":hover": {
+                    "color": {
+                        "background": "#dc2626"
+                    }
+                }
+            },
+            "link": {
+                "color": {
+                    "text": "var:preset|color|primary"
+                },
+                ":hover": {
+                    "color": {
+                        "text": "#dc2626"
+                    }
+                }
+            }
+        }
+    }
+}