Add new music discs and models for various shops; remove obsolete files

- Introduced new music discs: "City Under Siege", "Clothing Shop", "Food Mart", "Hat Shop", "Interior Shop", "Pawn Shop", and "Jump Up" with corresponding models and textures.
- Updated sounds.json to include new music disc entries.
- Created new JSON files for music disc models and their textures.
- Removed outdated models and textures for cobblestone, emerald, and stick.
- Deleted unnecessary blockbench textures and environment textures.
- Updated pack metadata to reflect new pack format and supported versions.

pack.mcmeta

@@ -1 +1,10 @@
-{"pack":{"description":"§7Friends CMP §c§lExtras§f §7Pack","pack_format":7}}
+{
+  "pack": {
+    "pack_format": 34,
+    "supported_formats": [
+      34,
+      79
+    ],
+    "description": "§7Friends CMP §c§lExtras§f §7Pack"
+  }
+}