docs(site-to-vpn): move page under Networks → Use Cases

The page describes a Networks-based setup; living under Network Routes
mis-categorised it.

- git mv to /manage/networks/use-cases/site-to-vpn.mdx (as a direct
  child of Use Cases, not under By Scenario)
- Navigation: remove entry from Network Routes → By Scenario, add under
  Networks → Use Cases
- Redirect old URL (/manage/network-routes/use-cases/by-scenario/site-to-vpn)
  to new URL, permanent
- Update in-tree links in use-cases/site-to-site/index.mdx and
  network-routes/use-cases/by-scenario/site-to-site-office.mdx

next.config.mjs

@@ -31,6 +31,11 @@ const nextConfig = {
                 destination: '/manage/networks',
                 permanent: true,
             },
+            {
+                source: '/manage/network-routes/use-cases/by-scenario/site-to-vpn',
+                destination: '/manage/networks/use-cases/site-to-vpn',
+                permanent: true,
+            },
             {
                 source: '/docs/getting-started/installation',
                 destination: '/get-started/install',

src/components/NavigationDocs.jsx

@@ -232,6 +232,10 @@ export const docsNavigation = [
                   },
                 ],
               },
+              {
+                title: 'Site-to-VPN',
+                href: '/manage/networks/use-cases/site-to-vpn',
+              },
             ],
           },
         ],
@@ -262,10 +266,6 @@ export const docsNavigation = [
                     title: 'Site-to-Site: Cloud',
                     href: '/manage/network-routes/use-cases/by-scenario/site-to-site-cloud',
                   },
-                  {
-                    title: 'Site-to-VPN',
-                    href: '/manage/network-routes/use-cases/by-scenario/site-to-vpn',
-                  },
                   {
                     title: 'Exit Nodes',
                     href: '/manage/network-routes/use-cases/by-scenario/exit-nodes',

src/pages/manage/network-routes/use-cases/by-scenario/site-to-site-office.mdx

@@ -180,7 +180,7 @@ ping 10.0.0.100  # HQ server
 
 Some scenarios require office systems without NetBird to initiate
 connections to NetBird-connected peers (monitoring, backups, management
-tools, etc.). See [Site-to-VPN](/manage/network-routes/use-cases/by-scenario/site-to-vpn)
+tools, etc.). See [Site-to-VPN](/manage/networks/use-cases/site-to-vpn)
 for the full step-by-step guide, including DNS resolution and the
 per-service port-forwarding alternative.
 

src/pages/use-cases/site-to-site/index.mdx

@@ -42,7 +42,7 @@ Office Server ──────► Routing Peer ──────► NetBird T
 - On-premise servers initiating backups to cloud peers
 - Legacy systems that must initiate outbound connections
 
-**Implementation:** Use [Networks](/manage/networks) (recommended) or [Network Routes](/manage/network-routes). See the [Site-to-VPN guide](/manage/network-routes/use-cases/by-scenario/site-to-vpn).
+**Implementation:** Use [Networks](/manage/networks) (recommended) or [Network Routes](/manage/network-routes). See the [Site-to-VPN guide](/manage/networks/use-cases/site-to-vpn).
 
 ### Site-to-Site
 
@@ -82,7 +82,7 @@ Your Laptop ──────► NetBird Tunnel ──────► Exit Node
 |-------------|----------|----------------|
 | Access home devices from my laptop | VPN-to-Site | [Networks](/manage/networks/use-cases/by-scenario/access-home-devices) |
 | Access office resources while traveling | VPN-to-Site | [Networks](/manage/networks/use-cases/by-scenario/remote-worker-access) |
-| Let an office server connect to my laptop | Site-to-VPN | [Networks](/manage/networks) or [Network Routes](/manage/network-routes/use-cases/by-scenario/site-to-vpn) |
+| Let an office server connect to my laptop | Site-to-VPN | [Networks](/manage/networks/use-cases/site-to-vpn) or [Network Routes](/manage/network-routes) |
 | Connect two home networks together | Site-to-Site | [Network Routes](/manage/network-routes/use-cases/by-scenario/site-to-site-home) only |
 | Link branch offices | Site-to-Site | [Network Routes](/manage/network-routes/use-cases/by-scenario/site-to-site-office) only |
 | Bridge cloud VPC with on-premise network | Site-to-Site | [Network Routes](/manage/network-routes/use-cases/by-scenario/site-to-site-cloud) only |