Add ambient music (#16829)

Resources/Audio/Ambience/attributions.yml

@@ -1,4 +1,65 @@
 - files: ["anomaly_drone.ogg"]
   license: "CC0-1.0"
   copyright: "Created by Joao_Janz, edited and converted to Mono by EmoGarbage"
-  source: "https://freesound.org/people/Joao_Janz/sounds/478472/"
+  source: "https://freesound.org/people/Joao_Janz/sounds/478472/"
+
+- files:
+  - "ambiatmos.ogg"
+  - "ambiatmos2.ogg"
+  - "ambicave.ogg"
+  - "ambicha1.ogg"
+  - "ambicha2.ogg"
+  - "ambicha3.ogg"
+  - "ambicha4.ogg"
+  - "ambidanger.ogg"
+  - "ambidanger2.ogg"
+  - "ambigen1.ogg"
+  - "ambigen2.ogg"
+  - "ambigen3.ogg"
+  - "ambigen4.ogg"
+  - "ambigen5.ogg"
+  - "ambigen6.ogg"
+  - "ambigen7.ogg"
+  - "ambigen8.ogg"
+  - "ambigen9.ogg"
+  - "ambigen10.ogg"
+  - "ambigen11.ogg"
+  - "ambigen12.ogg"
+  - "ambigen13.ogg"
+  - "ambigen14.ogg"
+  - "ambigen15.ogg"
+  - "ambiholy.ogg"
+  - "ambiholy2.ogg"
+  - "ambiholy3.ogg"
+  - "ambilava1.ogg"
+  - "ambilava2.ogg"
+  - "ambilava3.ogg"
+  - "ambimaint1.ogg"
+  - "ambimaint2.ogg"
+  - "ambimaint3.ogg"
+  - "ambimaint4.ogg"
+  - "ambimaint5.ogg"
+  - "ambimine.ogg"
+  - "ambimo1.ogg"
+  - "ambimo2.ogg"
+  - "ambimystery.ogg"
+  - "ambinice.ogg"
+  - "ambiodd.ogg"
+  - "ambiruin.ogg"
+  - "ambiruin2.ogg"
+  - "ambiruin3.ogg"
+  - "ambiruin4.ogg"
+  - "ambiruin5.ogg"
+  - "ambiruin6.ogg"
+  - "ambiruin7.ogg"
+  - "ambisin1.ogg"
+  - "ambisin2.ogg"
+  - "ambisin3.ogg"
+  - "ambisin4.ogg"
+  - "ambitech.ogg"
+  - "ambitech2.ogg"
+  - "ambitech3.ogg"
+  - "maintambience.ogg"
+  license: "CC-BY-SA-3.0"
+  copyright: "Taken from tgstation"
+  source: "https://github.com/tgstation/tgstation/tree/ae9767664701396501af5dcef8e34c4b5add3d47/sound/ambience"