Create FUS Gradle plugin

fus-statistics-gradle-plugin can be used by any other Gradle plugins to
collect additional metrics for FUS.

KT-59627

settings.gradle

@@ -217,6 +217,7 @@ include ":kotlin-imports-dumper-compiler-plugin",
         ":gradle:kotlin-compiler-args-properties",
         ":gradle:regression-benchmark-templates",
         ":gradle:regression-benchmarks",
+        ":libraries:tools:gradle:fus-statistics-gradle-plugin",
         ":kotlin-tooling-metadata",
         ":kotlin-tooling-core",
         ":kotlin-allopen",