feat(pack): add LambDynamicLights

Client-side NeoForge 1.21.1 dynamic lighting for held and placed light
sources. Modrinth reports server_side as unsupported, so packwiz writes
side = "client" and the jar stays off the server.

The Modrinth version metadata lists Fabric API as a required dependency,
but that entry is not loader-scoped. The NeoForge jar actually depends
only on its JarJar-bundled lambdynlights_runtime, so packwiz failing to
resolve Fabric API is expected and no fabric-api metafile is added.

index.toml

@@ -315,6 +315,11 @@ file = "mods/kotlin-for-forge.pw.toml"
 hash = "712a69b3569a8055979de6eea262068535fe182dffb3833e53e5833e9cbf9766"
 metafile = true
 
+[[files]]
+file = "mods/lambdynamiclights.pw.toml"
+hash = "ebf0dae777cc19c354a662dc8144009dff7269b2d05624b4591fcb7de56fc14e"
+metafile = true
+
 [[files]]
 file = "mods/lithium.pw.toml"
 hash = "51e129832b04acd57da470fc41725bad5e101b6a6b1d4901fd8ea7a92b14e13d"