docs(install): point install one-liners at unarr.app

README used get.torrentclaw.com and the install scripts advertised
get.unarr.com (a third-party parked domain, dead). unarr.app is the
canonical install domain.

README.md

@@ -23,13 +23,13 @@ Built-in torrent engine, debrid (Real-Debrid / AllDebrid), and NZB support. Stre
 ### Quick install (Linux/macOS)
 
 ```bash
-curl -fsSL https://get.torrentclaw.com/install.sh | sh
+curl -fsSL https://unarr.app/install.sh | sh
 ```
 
 ### PowerShell (Windows)
 
 ```powershell
-irm https://get.torrentclaw.com/install.ps1 | iex
+irm https://unarr.app/install.ps1 | iex
 ```
 
 ### Homebrew (macOS/Linux)

install.ps1

@@ -1,5 +1,5 @@
 # unarr — Windows installer (PowerShell 5.1+)
-# Usage: irm https://get.unarr.com/install.ps1 | iex
+# Usage: irm https://unarr.app/install.ps1 | iex
 #    or: irm https://raw.githubusercontent.com/torrentclaw/unarr/main/install.ps1 | iex
 #
 # Options (env vars):

install.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # unarr — cross-platform installer (Linux / macOS)
-# Usage: curl -fsSL https://get.unarr.com/install.sh | sh
+# Usage: curl -fsSL https://unarr.app/install.sh | sh
 #    or: curl -fsSL https://raw.githubusercontent.com/torrentclaw/unarr/main/install.sh | sh
 #
 # Options (env vars):