* docs: rewrite Networks page as a teaching guide
Rework /manage/networks from a reference-style concept page into a
structured teaching guide: mental model, the four building blocks
(Network, Resource, Access policy, Routing peer), how a packet reaches
a resource, and an end-to-end walkthrough for reaching two internal
apps with Zero Trust access by default.
- Add a production checklist (HA, monitoring, masquerade, internal DNS,
routing-peer access) and a clear "Networks or Network Routes?" split:
Networks now covers every remote-access scenario except exit nodes.
- Add worked-example and resource-list screenshots.
- how-routing-peers-work: point site-to-site at Networks, describe
Routing Peer DNS Resolution as on by default, and restore the
0.59.x domain-resolution compatibility note.
- Rename the sidebar entry from "Concept" to "Overview".
* image organization into /networks dir
* fix embedded images in networks/index.mdx
* docs: note no inbound ports and Linux-only masquerade on Networks page
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Co-authored-by: TechHutTV <brandon@techhut.tv>
