apps/navibeat-linux: add NaviBeat for Linux (free desktop build)

assets/apps/navibeat-linux/index.yaml

@@ -0,0 +1,24 @@
+name: NaviBeat for Linux
+url: https://navibeat.app/linux
+repoUrl: https://github.com/nenadjokic/navibeat-linux
+isFree: true
+isOpenSource: false
+platforms:
+  linux: true
+api: OpenSubsonic
+description: "A free, native Linux desktop player for Subsonic, OpenSubsonic, and Navidrome. Time-synced lyrics with an optional karaoke mode, offline downloads, internet radio, a 10-band equalizer with ReplayGain and crossfade, AutoMix endless playback, Last.fm and ListenBrainz, listening stats, and a built-in tool that syncs your library to a Rockbox iPod with plays synced back. Ships as an AppImage for x86_64 and aarch64."
+screenshots:
+  thumbnail: thumbnail.webp
+  gallery:
+    - screen1.webp
+    - screen2.webp
+    - screen3.webp
+    - screen4.webp
+    - screen5.webp
+keywords:
+  - linux
+  - desktop
+  - appimage
+  - rockbox
+  - equalizer
+  - lyrics