make halloween theme the preffered theme and change FMHY name gradient

docs/.vitepress/theme/components/ColorPicker.vue

@@ -39,7 +39,7 @@ const colorScales = [
 ] as const
 
 type ColorNames = keyof typeof extendedColors
-const selectedColor = useStorage<ColorNames>('preferred-color', 'swarm')
+const selectedColor = useStorage<ColorNames>('preferred-color', 'halloween')
 
 const colorOptions = Object.keys(extendedColors).filter(
   (key) => typeof extendedColors[key as keyof typeof extendedColors] === 'object'

docs/.vitepress/theme/style.scss

@@ -163,14 +163,14 @@
   --vp-home-hero-name-color: transparent;
   --vp-home-hero-name-background: -webkit-linear-gradient(
     120deg,
-    #c4b5fd 30%,
-    #7bc5e4
+    #ff8c3a 30%,
+    #FF6A00
   );
 
   --vp-home-hero-image-background-image: linear-gradient(
     -45deg,
-    #c4b5fd 50%,
-    #47caff 50%
+    #ff8c3a 50%,
+    #ea580c 50%
   );
   --vp-home-hero-image-filter: blur(44px);
 }