feat: add 3D toggle and adjust theme

src/NetworkTheme.tsx

@@ -0,0 +1,59 @@
+import { Theme } from "reagraph";
+
+export const customTheme: Theme = {
+  canvas: {
+    background: 'aliceblue',
+  },
+  node: {
+    fill: '#69F',
+    activeFill: '#36C',
+    opacity: 1,
+    selectedOpacity: 1,
+    inactiveOpacity: 0.333,
+    label: {
+      color: '#404040',
+      stroke: 'white',
+      activeColor: 'black'
+    },
+    subLabel: {
+      color: '#ddd',
+      stroke: 'transparent',
+      activeColor: '#1DE9AC'
+    }
+  },
+  lasso: {
+    border: '1px solid #55aaff',
+    background: 'rgba(75, 160, 255, 0.1)'
+  },
+  ring: {
+    fill: '#69F',
+    activeFill: '#36C'
+  },
+  edge: {
+    fill: '#bed4ff',
+    activeFill: '#36C',
+    opacity: 1,
+    selectedOpacity: 1,
+    inactiveOpacity: 0.2,
+    label: {
+      stroke: '#fff',
+      color: '#2A6475',
+      activeColor: '#1DE9AC',
+      fontSize: 6
+    }
+  },
+  arrow: {
+    fill: '#bed4ff',
+    activeFill: '#36C'
+  },
+  cluster: {
+    stroke: '#D8E6EA',
+    opacity: 1,
+    selectedOpacity: 1,
+    inactiveOpacity: 0.1,
+    label: {
+      stroke: '#fff',
+      color: '#2A6475'
+    }
+  }
+};