Build for Minecraft 26.1, 26.2 and 26.3

Adds the three drops as Stonecutter versions (26.1's jar also accepts
its hotfixes). loom-back-compat already picks the plain Loom for 26.x;
the testmod's remap configurations are only created where there's
something to remap, and the foojay resolver downloads the Java 25
toolchain these versions need.

- 26.3 renamed PoseStack.mulPose(Quaternionfc) to rotate.
- The testmod follows Fabric API's renames: ClientCommands (26.1),
  getClientLevel (26.1) and getConnection (26.2) for waiting on chunks.
- 26.2 replaced Options.hideGui with the HUD's toggle, so the gametest
  toggles it through a helper.

The screenshot gametest passes on 26.1, 26.2 and 26.3, and the bent
limbs match 1.21.11's.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

stonecutter.properties.toml

@@ -38,3 +38,16 @@ deps.fabric_api = "0.138.4+1.21.10"
 ["1.21.11"]
 mod.mc_compat = "1.21.11"
 deps.fabric_api = "0.141.6+1.21.11"
+
+# Built against 26.1 and allowed on its hotfixes (26.1.1, 26.1.2).
+["26.1"]
+mod.mc_compat = "~26.1"
+deps.fabric_api = "0.145.1+26.1"
+
+["26.2"]
+mod.mc_compat = "26.2"
+deps.fabric_api = "0.161.0+26.2"
+
+["26.3"]
+mod.mc_compat = "26.3"
+deps.fabric_api = "0.161.0+26.3"