chore: move filters into their own file

packages/search-site/src/index.mjs

@@ -1,19 +1,9 @@
 import Vue from 'vue';
 import Router from 'vue-router';
+import './filters.mjs';
 
 Vue.use(Router);
 
-Vue.filter('capitalize', value => {
-  if (!value) return '';
-  const v = value.toString();
-  return v.charAt(0).toUpperCase() + v.slice(1);
-});
-
-Vue.filter('round', (value, digits = 2) => {
-  const v = parseFloat(value, 10);
-  return Math.round(v * (10 * digits)) / (10 * digits);
-});
-
 const router = new Router({
   mode: 'history',
   routes: [