Create/Update assets for version 1.21.3

assets/minecraft/textures/gui/title/_list.json

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+{"directories":["background"],"files":["edition.png","edition.png.mcmeta","minceraft.png","minceraft.png.mcmeta","minecraft.png","minecraft.png.mcmeta","mojangstudios.png","realms.png","realms.png.mcmeta"]}

assets/minecraft/textures/gui/title/background/_list.json

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+{"directories":[],"files":["panorama_0.png","panorama_1.png","panorama_2.png","panorama_3.png","panorama_4.png","panorama_5.png","panorama_overlay.png"]}

assets/minecraft/textures/gui/title/edition.png.mcmeta

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+{
+  "texture": {
+    "blur": true
+  }
+}

assets/minecraft/textures/gui/title/minceraft.png.mcmeta

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+{
+  "texture": {
+    "blur": true
+  }
+}

assets/minecraft/textures/gui/title/minecraft.png.mcmeta

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+{
+  "texture": {
+    "blur": true
+  }
+}

assets/minecraft/textures/gui/title/realms.png.mcmeta

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+{
+  "texture": {
+    "blur": true
+  }
+}