Scaffold the emote library with a Stonecutter Fabric mod and tester

- core/: Minecraft-independent animation model (Bone, BoneTransform with
  bend fields, Pose, Animation, AnimationPlayer) with JUnit tests.
- src/main: Fabric mod built for 1.21.4-1.21.11 with Stonecutter on
  Mojang mappings. Samples each player's pose into its render state and
  applies it at the end of HumanoidModel.setupAnim (armor follows too).
- src/testmod: dev-only tester with /emotes play|stop|info and a mixin
  audit on startup.
- Publishing to the saturnclientmc Gitea Maven registry as
  org.saturnclient:emotes-core and emotes-fabric:<v>+<mc>.

Loom is pinned to 1.17 because 1.18 needs a Java 25 JVM.

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

settings.gradle.kts

@@ -0,0 +1,28 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        maven("https://maven.fabricmc.net/")
+        maven("https://maven.kikugie.dev/releases") { name = "KikuGie Releases" }
+        maven("https://maven.kikugie.dev/snapshots") { name = "KikuGie Snapshots" }
+    }
+}
+
+plugins {
+    id("dev.kikugie.stonecutter") version "0.9.8"
+    // Picks the right Loom variant per Minecraft version (remapping for 1.21.x, plain for 26.1+).
+    id("dev.kikugie.loom-back-compat") version "0.4.2"
+}
+
+stonecutter {
+    create(rootProject) {
+        // Same range as Saturn Client. Per-version dependencies live in stonecutter.properties.toml.
+        versions("1.21.4", "1.21.5", "1.21.6", "1.21.7", "1.21.8", "1.21.9", "1.21.10", "1.21.11")
+        vcsVersion = "1.21.11"
+    }
+}
+
+rootProject.name = "emotes"
+
+// Minecraft-independent animation code, shared by every version node.
+include("core")