improvement(format): Parse for BTN Atmos labelling

- Instead of 'Atmos', match a singular 'A' after 'TrueHD' or 'DDP'
- The.Last.of.Us.S01.2160p.UHD.BluRay.Remux.TrueHDA7.1.H.265-PmP

custom_formats/Atmos (Missing).yml

@@ -21,4 +21,9 @@ conditions:
   pattern: TrueHD
   required: true
   type: release_title
+- name: Not Atmos (BTN)
+  type: release_title
+  required: true
+  negate: true
+  pattern: Atmos (BTN)
 tests: []

custom_formats/Atmos.yml

@@ -8,6 +8,11 @@ conditions:
 - name: Atmos
   negate: false
   pattern: Atmos
-  required: true
+  required: false
   type: release_title
+- name: Atmos (BTN Standard)
+  type: release_title
+  required: false
+  negate: false
+  pattern: Atmos (BTN)
 tests: []