docs: document self-hosting the web UI and community projects

Documents the daemon-served web UI from #1635: enabling it, reverse
proxy, TLS, tunnels, and the auth/exposure model. Adds a community
projects page for community-built self-hosting tooling.

public-docs/index.md

@@ -27,6 +27,8 @@ paseo
 
 Paseo prints a QR code in the terminal. Scan it from the mobile app, or enter the daemon address manually from another client.
 
+The daemon can also serve the browser web app itself, so you can use the full UI without the hosted app. See [Self-hosting the web UI](/docs/web-ui).
+
 Configuration and local state live under `PASEO_HOME` (defaults to `~/.paseo`).
 
 ## Where next
@@ -34,6 +36,7 @@ Configuration and local state live under `PASEO_HOME` (defaults to `~/.paseo`).
 - [Workspaces](/docs/workspaces), the project, workspace, and session model Paseo is built around.
 - [Providers](/docs/providers), what a provider is and how Paseo wraps existing CLIs.
 - [CLI reference](/docs/cli), every command.
+- [Self-hosting the web UI](/docs/web-ui), serve the browser app from your own daemon.
 - [GitHub repo](https://github.com/getpaseo/paseo)
 - [Report an issue](https://github.com/getpaseo/paseo/issues)