Update Kotest version and migrate to wasmWasi target

Upgraded Kotest to version 6.0.0.M8 and replaced the `wasmJs` target with the `wasmWasi` target in the build configuration. Adjusted dependencies and source set usage to align with the wasi target requirements.

Author: sksamuel

kotest-native/gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-kotest = "6.0.0-LOCAL"
+kotest = "6.0.0.M8"
 kotlin = "2.2.0"
 
 [libraries]

kotest-wasm/build.gradle.kts

@@ -21,15 +21,20 @@ kotlin {
       languageVersion = KotlinVersion.KOTLIN_2_2
    }
 
-   wasmJs {
+//   wasmJs {
+//      binaries.executable()
+//      nodejs()
+//   }
+
+   wasmWasi {
       binaries.executable()
       nodejs()
    }
 
    sourceSets {
-      wasmJsTest {
+      wasmWasiTest {
          dependencies {
-            implementation(libs.kotest.assertions.core)
+//            implementation(libs.kotest.assertions.core)
             implementation(libs.kotest.framework.engine)
          }
       }