Improve sample projects

[qurbonzoda]

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Sample projects are meant to showcase the library features and possible configurations. Current example projects do not cover all of them.

Introduce sample projects for:

• [ ] Kotlin Mutiplatform project where the benchmark code is within the main compilation of Kotlin targets
• [ ] Kotlin Mutiplatform project where the benchmark code is separated from the main compilation of Kotlin targets
• [ ] Kotlin/JVM and Java projects where the benchmark code is within the main source set of the project
• [ ] Kotlin/JVM and Java projects where the benchmark code is separated from the main source set of the project
• [ ] Kotlin Mutiplatform project where Kotlin/JS or Wasm benchmarks are executed with the built-in executor
• [ ] Kotlin Mutiplatform, Kotlin/JVM and Java projects where jmhVersion is specified, including with benchmarks_jmh_version project property.
• [ ] Configure the main configuration profile to demonstrate:
  • [ ] Options override annotations in benchmark code
  • [ ] Time unit string formats supported
  • [ ] Benchmark mode option impact
  • [ ] reportFormat option usage and the reports of different formats
  • [ ] param option usage
  • [ ] advanced option usage
• [ ] Create and configure additional configuration profiles
  • [ ] Include and exclude benchmarks

The introduced samples should:

• Document what does the project demonstrates
• Document relevant tasks the kotlinx-benchmark plugin creates
• Use Kotlin DSL in the Gradle build script

Make sure to reference those project from the relevant guides.