Terrain-first hydrology

- Replace the river package with the hydrology planner, footprint compiler, cave containment and runtime
- Add the hydrology pack schema, validator, probes and tests
- Wire hydrology into IrisComplex, actuators, mantle, Vision and commands

adapters/neoforge/build.gradle

@@ -105,6 +105,10 @@ configurations.testRuntimeClasspath.extendsFrom(configurations.runtimeClasspath,
 
 dependencies {
     testImplementation('junit:junit:4.13.2')
+    testImplementation('org.mockito:mockito-core:5.23.0')
+    testImplementation(libs.spigot) {
+        transitive = false
+    }
     testRuntimeOnly('org.junit.platform:junit-platform-launcher:6.1.2')
     testRuntimeOnly('org.junit.vintage:junit-vintage-engine:6.1.2')
     compileOnly('org.slf4j:slf4j-api:2.0.17')