feat(pack): add Duper's Auto Walk

Client-side NeoForge 1.21.1 mod that walks the player forward on a
toggleable keybind. Modrinth reports server_side as unsupported, so
packwiz writes side = "client" and the jar stays off the server.

pack.toml

@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "4b3a3770906f649b03c0d5d771411b85be3c4c05fd7600a385974b7c34644e5c"
+hash = "9165474a901d2713756623f0e6438b46d3d7e82b785fbe20384c7040a449a486"
 
 [versions]
 minecraft = "1.21.1"