feat(projects): 添加exception页面：403，404，500

src/views/system/exception/404.vue

@@ -1,6 +1,17 @@
 <template>
-  <div>404</div>
+  <div class="flex-center flex-col w-full h-full">
+    <exception-svg type="404" :color="theme.themeColor" />
+    <router-link to="/">
+      <n-button type="primary">回到首页</n-button>
+    </router-link>
+  </div>
 </template>
 
-<script lang="ts" setup></script>
+<script lang="ts" setup>
+import { NButton } from 'naive-ui';
+import { ExceptionSvg } from '@/components';
+import { useThemeStore } from '@/store';
+
+const theme = useThemeStore();
+</script>
 <style scoped></style>