plots: correct Numismatics coin chain (6 denoms incl sprocket), 0.22.4 -> 0.22.5

Was: 5-denom x8 chain (spur=1, bevel=8, cog=64, crown=512, sun=4096).
Now: 6-denom x8 chain with sprocket inserted between bevel and cog.

Verified in-game (user reported Sun = 64 Cogs, which only fits these
values: spur=1, bevel=8, sprocket=64, cog=512, crown=4096, sun=32768).

Plot purchase math (countCoins, takeCoins, giveCoins) was using the
old 5-denom map: cog would have been counted as 64 spurs when it's
actually 512, and sprockets weren't counted at all. Plot prices remain
at 100/250/600 spurs which are still appropriate small-change amounts;
user can edit PLOT_DEFS to raise once playtesting confirms desired
economy scale.

pack/pack.lock.json

@@ -1,7 +1,7 @@
 {
   "$schema": "Brass-and-Sigil pack.lock.json - generated, do not edit by hand unless you know what you are doing",
   "name": "Brass and Sigil",
-  "version": "0.22.4",
+  "version": "0.22.5",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",