feat: add dark theme support and update homepage content

- Integrated next-themes for dark mode theming with default dark theme
- Added new UI components (GridBlink, Spotlight) and enhanced world map with cyan glow effects
- Updated homepage messaging to emphasize Mycelium as a living network with new audience imagery

package-lock.json

@@ -28,6 +28,7 @@
         "framer-motion": "^10.18.0",
         "lucide-react": "^0.544.0",
         "motion": "^12.23.24",
+        "next-themes": "^0.4.6",
         "popmotion": "^11.0.5",
         "react": "^18.3.1",
         "react-countup": "^6.5.3",
@@ -9417,6 +9418,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/next-themes": {
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.4.6.tgz",
+      "integrity": "sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc"
+      }
+    },
     "node_modules/node-releases": {
       "version": "2.0.26",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.26.tgz",