Improve Kover setup by using only convention plugins (#6213)

* Improve Kover setup using convention plugins.
* Add a new JVM library convention plugin with Kover support

plugins/src/main/kotlin/io.element.android-compose-application.gradle.kts

@@ -13,6 +13,7 @@ import extension.androidConfig
 import extension.commonDependencies
 import extension.composeConfig
 import extension.composeDependencies
+import extension.setupKover
 import org.gradle.accessors.dm.LibrariesForLibs
 
 val libs = the<LibrariesForLibs>()
@@ -37,6 +38,8 @@ kotlin {
     }
 }
 
+setupKover()
+
 dependencies {
     commonDependencies(libs)
     composeDependencies(libs)