feat(mods): add Doggy Talents Next, drop Etched and Grassier Grass

Doggy Talents Next 1.19.1 (NeoForge 1.21.1) overhauls the wolf with a
talent/bond system and companion AI. Better Dogs X DTN 1.2.2 adds its
cosmetic skins; Modrinth only lists a 1.21 NeoForge build, but its
mods.toml declares neoforge >=20.5 and minecraft >=1.18.2, so it loads
on the pack's 21.1.251.

Remove Etched: a second disc/recording pipeline beside music-disc-maker,
duplicating blank discs, boomboxes and albums.

Remove Grassier Grass: its only open risk was shader compatibility with
the shipped Complementary Reimagined.

mods/better_dogs_x_doggy_talents_next.pw.toml

@@ -0,0 +1,13 @@
+name = "Better Dogs X Doggy Talents Next"
+filename = "Better_Dogs_X_Doggy_Talents_Next_v1.2.2 [NeoForge]-[1.21].jar"
+side = "both"
+
+[download]
+url = "https://cdn.modrinth.com/data/JT2UVYcB/versions/kIpvGqx4/Better_Dogs_X_Doggy_Talents_Next_v1.2.2%20%5BNeoForge%5D-%5B1.21%5D.jar"
+hash-format = "sha512"
+hash = "9523498a30f3293b1f5f2fc3852e7d30239bad4561b3bff32e40b10f41fca8fc6a446306c68a81daaf60a892e7dd87a1292f060f12f5fb9427513f5cf609588a"
+
+[update]
+[update.modrinth]
+mod-id = "JT2UVYcB"
+version = "kIpvGqx4"