content: add 8-Bit Adventure boombox track (#34)

Co-authored-by: Paperclip <noreply@paperclip.ing>

Author: tallnato

content/_boombox/8-bit-adventure.md

@@ -0,0 +1,15 @@
+---
+title: 8-Bit Adventure
+author: Volts Community
+description: A retro chiptune track with energetic, arcade-style vibes. CC0 licensed placeholder.
+audio: 8-bit-adventure.mp3
+files:
+  - name: 8-bit-adventure.mp3
+    label: Audio Track
+tags:
+  - retro
+  - gaming
+  - electronic
+---
+
+An energetic chiptune track that channels classic arcade adventures. Bring some retro gaming energy to your Boombox.