Centralize all dependencies in version catalog

[Copilot]

This PR consolidates all hardcoded dependencies across the project's build.gradle.kts files into the centralized version catalog (gradle/libs.versions.toml), improving dependency management and consistency.

Changes Made

Updated gradle/libs.versions.toml

• Added version entries for previously hardcoded dependencies:
  • junit = "5.10.1"
  • kotest = "5.8.0"
  • syntaxerrorJson5 = "2.1.0"
• Added library entries for all testing dependencies:
  • junit, kotestRunner, kotestAssertions, kotestProperty
• Added external library entry for syntaxerrorJson5
• Created a testing bundle that groups all test dependencies for convenient importing

Updated lib/build.gradle.kts

• Replaced 4 hardcoded test dependencies with a single bundle reference:

  // Before
  testImplementation("org.junit.jupiter:junit-jupiter:5.10.1")
  testImplementation("io.kotest:kotest-runner-junit5:5.8.0")
  testImplementation("io.kotest:kotest-assertions-core:5.8.0")
  testImplementation("io.kotest:kotest-property:5.8.0")
  
  // After
  testImplementation(libs.bundles.testing)

Updated benchmark/build.gradle.kts

• Replaced hardcoded dependencies with catalog references:

  // Before
  implementation("at.syntaxerror:json5:2.1.0")
  testImplementation("org.junit.jupiter:junit-jupiter:5.10.1")
  
  // After
  implementation(libs.syntaxerrorJson5)
  testImplementation(libs.junit)

Benefits

• Centralized version management: All dependency versions are now managed in one place
• Consistency: Ensures the same versions are used across all modules
• Maintainability: Version updates only need to be made in the version catalog
• Type safety: Gradle's type-safe accessors provide compile-time validation
• Reduced duplication: The testing bundle eliminates repeated dependency declarations

Verification

• ✅ All builds pass (./gradlew build)
• ✅ All tests continue to pass (127 tests completed, 2 skipped)
• ✅ No functionality changes - this is purely a refactoring for better dependency management

Fixes #36.

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[hossain-khan]

TIL! 🤯