Add support of Kover Gradle Plugin to IntelliJ IDEA

[shanshin]

The IntelliJ IDEA should be able to configure the plugin using the UI.

Basic features:

• when importing Gradle model, determine that the Kover Gradle Plugin has been applied
• read Kover Gradle Plugin settings from build scripts
• show Kover settings
• allow to disable instrumentation by the Kover agent (it is necessary to design whether Kover will always be disabled by default or it is necessary to explicitly turn it off)
• think about how Kover will be combined with the Run with Coverage function
• allow to configure the Kover Gradle Plugin using the UI and save these changes in the build script files
• automatically upload the coverage results of all running test tasks after build with the Kover

[shanshin]

Point think about how Kover will be combined with the Run with Coverage function solves issue #7

[shanshin]

This task will be taken into account when migrating to Kotlin Gradle Plugin.

In the future, it will be moved to the Kotlin task tracker, or closed if it loses relevance.