update 26.3 dependencies and pack mods

- polymer 0.18.0+26.3-rc-1 -> 0.18.2+26.3 (first 26.3 final build)
- fabric-api 0.160.5 -> 0.161.0, loom 1.18.1 -> 1.18.2
- pack: move squaremap, syncmatica, farmers-delight (+polymer patch),
  jei, worldedit, lithium to their 26.3 builds; bump fabric-api, polymer
- lithium now resolved from Modrinth instead of CurseForge (same mod, same author)
- docs: fix stale hurtMarked reference, drop carpet snapshot warning

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

server-deploy/pack/mods/farmers-delight-polymer.pw.toml

@@ -1,13 +1,13 @@
 name = "Polymer Patch for Farmer's Delight"
-filename = "farmers-delight-polymer-patch-3.6.7.0+26.2.jar"
+filename = "farmers-delight-polymer-patch-3.6.21.0+26.3.jar"
 side = "server"
 
 [download]
-url = "https://cdn.modrinth.com/data/TE3NCFiY/versions/11AvsXE3/farmers-delight-polymer-patch-3.6.7.0%2B26.2.jar"
+url = "https://cdn.modrinth.com/data/TE3NCFiY/versions/ZqkEEPvU/farmers-delight-polymer-patch-3.6.21.0%2B26.3.jar"
 hash-format = "sha512"
-hash = "9e04f5c68e4209bd0e1de932858ebf4273c369b9943e38cbce8665311d7ff7d3fdfe20493e78769d9b92047678dff995e2d5d998f9978ab73896321ed125e09d"
+hash = "b65bf9a9271eee5a231a3c221dc7297835a524edf44507f96ddb1808b4a547361d5a87edec226a054769d78394e5feec73281bbc2999a38d3280484bcd2eb522"
 
 [update]
 [update.modrinth]
 mod-id = "TE3NCFiY"
-version = "11AvsXE3"
+version = "ZqkEEPvU"