feat(pack): add Waystones and its compatibility addons

Adds Waystones plus two integrations that hook mods already in the pack:
Waystones: Sable (Create Aeronautics addon) and Xaero's Minimap & World
Map - Waystones Compatibility.

packwiz auto-resolved Balm as Waystones' required library; it was then
added explicitly as well, which was a no-op, so there is only one Balm
metafile.

Balm's Modrinth environment is client_or_server, which packwiz flags as
ambiguous ("one of these is unnecessary") and records as side = both.
That is the right call here: Balm is a library needed wherever Waystones
runs, and Waystones is client_and_server.

All four pinned versions are NeoForge 1.21.1 releases, and each jar's
sha512 was re-verified against its recorded hash.

pack.toml

@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "a3547b2f07e7583e2ecfb9d96afe1780535134d2c63c789b6a0dbeaeef2c9200"
+hash = "b39ae3e18dd3f48977aee61c3bd1c9b2693facfa7aaab341e2bb1086b78a15a3"
 
 [versions]
 minecraft = "1.21.1"