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.

index.toml

@@ -435,6 +435,11 @@ file = "mods/macaws-windows.pw.toml"
 hash = "450ed5663bf1d12ffddc78eda5aa56cb7808cbdac6db8102d18461361aaa555f"
 metafile = true
 
+[[files]]
+file = "mods/mazes.pw.toml"
+hash = "171cd9e5ff7d88b83575262701803688ed951b159df23e8e5bc53f26fb41ec05"
+metafile = true
+
 [[files]]
 file = "mods/mezzconfig.pw.toml"
 hash = "efad386063cb79013d7522fcc5b5879c5c3cd556e83bd41a56980632827b45b2"