Move dependency versions from properties to build script

Versions of various dependencies that were previously defined in gradle.properties have been directly embedded into the build.gradle.kts script. This change simplifies the structure and makes dependency management in one centralized location.

build.gradle.kts

@@ -1,11 +1,5 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21
 
-val arrowVersion: String by project
-val coroutinesVersion: String by project
-val kotestVersion: String by project
-val kotlinVersion: String by project
-val serializationVersion: String by project
-
 plugins {
     idea
     id("com.github.ben-manes.versions") version "0.51.0"
@@ -23,14 +17,15 @@ repositories {
 dependencies {
     implementation(kotlin("reflect"))
     implementation(kotlin("stdlib"))
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion")
-    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:$serializationVersion")
-    implementation("io.arrow-kt:arrow-core:$arrowVersion")
-
-    testImplementation("io.kotest:kotest-assertions-core:$kotestVersion")
-    testImplementation("io.kotest:kotest-framework-datatest:$kotestVersion")
-    testImplementation("io.kotest:kotest-property:$kotestVersion")
-    testImplementation("io.kotest:kotest-runner-junit5:$kotestVersion")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.0")
+    implementation("io.arrow-kt:arrow-core:1.2.4")
+
+    testImplementation(platform("io.kotest:kotest-bom:5.9.1"))
+    testImplementation("io.kotest:kotest-assertions-core")
+    testImplementation("io.kotest:kotest-framework-datatest")
+    testImplementation("io.kotest:kotest-property")
+    testImplementation("io.kotest:kotest-runner-junit5")
 }
 
 kotlin {

gradle.properties

@@ -1,9 +1 @@
-# Dependencies
-arrowVersion=1.2.4
-coroutinesVersion=1.8.1
-kotestVersion=5.9.1
-kotlinVersion=2.0.0
-serializationVersion=1.7.0
-
-# Other settings
 kotlin.code.style=official