Add Dispatcharr IPTV stack

dispatcharr/README.md

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+# Dispatcharr
+
+Dispatcharr IPTV stack for PD.
+
+Live paths:
+- Compose: `/mnt/docker-ssd/docker/compose/dispatcharr`
+- Appdata: `/mnt/docker-ssd/docker/appdata/dispatcharr`
+
+Deployment:
+```bash
+cd /mnt/docker-ssd/docker/compose/dispatcharr
+sudo -n docker compose --env-file .env config
+sudo -n docker compose --env-file .env up -d
+```
+
+Access:
+- Direct LAN URL: `http://10.5.30.6:9191`
+
+Notes:
+- Uses Dispatcharr's recommended all-in-one container (`DISPATCHARR_ENV=aio`).
+- Data is persisted at `/mnt/docker-ssd/docker/appdata/dispatcharr`.
+- First-run setup creates the initial local Dispatcharr user in the web UI.
+- IPTV credentials and EPG sources are added later through the UI.