Consolidate source layout

- Packages regrouped by domain: generation, world, pack, studio, structure, platform, command, localization, diagnostics
- Forked VolmLib utilities dropped for the shared library: noise, stream, interpolation, hunk, matter
- Engine-coupled stream decorators moved to generation.stream.GenerationStreams
- Hunk section splits now run on the Iris burst pool through HunkBurst
- Artifact entry lists, purity allowlists and shrink rules follow the new paths

core/agent/build.gradle

@@ -14,8 +14,8 @@ dependencies {
 
 tasks.named('jar', Jar).configure {
     manifest.attributes(
-        'Agent-Class': 'art.arcane.iris.util.project.agent.Installer',
-        'Premain-Class': 'art.arcane.iris.util.project.agent.Installer',
+        'Agent-Class': 'art.arcane.iris.platform.agent.Installer',
+        'Premain-Class': 'art.arcane.iris.platform.agent.Installer',
         'Can-Redefine-Classes': true,
         'Can-Retransform-Classes': true
     )