feat(pack): add Mazes

Mazes is a NeoForge 1.21.1 mod that adds a Maze Generator block: place it,
open the GUI, and it builds a flat, configurable maze on the block's own
level. The border is a subtractive cell mask cut out with pencil/rectangle
tools, so it can fill odd shapes and rooms instead of only a rectangle.

The mod is not on Modrinth or CurseForge, so the jar is hosted as a release
asset on yonlu/mazes and referenced with a packwiz url metafile. It targets
NeoForge 21.1.0+, so the pack's 21.1.251 is fine, and side is "both" because
it registers a block entity and network payloads.

mods/mazes.pw.toml

@@ -0,0 +1,8 @@
+name = "Mazes"
+filename = "mazes-0.1.0.jar"
+side = "both"
+
+[download]
+url = "https://git.ljones.me/yonlu/mazes/releases/download/v0.1.0/mazes-0.1.0.jar"
+hash-format = "sha256"
+hash = "405d9e4178856d15bf446abb7644b0617d22ac4503d0743bcb1c589abecaaf3d"