Refactoring: Add PreScript.http

Rest.http

@@ -1,19 +1,4 @@
-{{
-    const axios = require('axios');
-
-    const wait = axios.get(`${host}/products`).then(res => {
-        let length = res.data.length;
-        let exists = res.data.find(item => item.id === 78);
-        if(length===78 && exists){
-            return axios.delete(`${host}/products?id=eq.78`)
-            .then(res => {
-                return null;
-            })
-        }
-        return null;
-    })
-    exports.wait = wait;
-}}
+# @import ./PreScript.http
 ###
 
 GET /products/1
@@ -22,7 +7,6 @@ GET /products/1
 ?? body id == 1
 
 ###
-
 GET /products
 ?? status == 200
 ?? body length == 77