docs: Reorder pages in the introductory docs (TanStack#1865)

* docs: reorder pages in introduction docs

* docs: link from quick start page to key concepts

Author: AntonNiklasson

docs/src/manifests/manifest.json

@@ -14,16 +14,16 @@
           "path": "/installation",
           "editUrl": "/installation.md"
         },
-        {
-          "title": "Devtools",
-          "path": "/devtools",
-          "editUrl": "/devtools.md"
-        },
         {
           "title": "Quick Start",
           "path": "/quick-start",
           "editUrl": "/quick-start.md"
         },
+        {
+          "title": "Devtools",
+          "path": "/devtools",
+          "editUrl": "/devtools.md"
+        },
         {
           "title": "Videos & Talks",
           "path": "/videos",

docs/src/pages/quick-start.md

@@ -5,9 +5,9 @@ title: Quick Start
 
 This example very briefly illustrates the 3 core concepts of React Query:
 
-- Queries
-- Mutations
-- Query Invalidation
+- [Queries](./guides/queries)
+- [Mutations](./guides/mutations)
+- [Query Invalidation](./guides/query-invalidation)
 
 ```js
 import {