Add library containing detekt rules for apollo plugins

game/plugin-detekt-rules/src/test/kotlin/org/apollo/game/plugin/detekt/rules/DeclarationInScriptRuleTest.kt

@@ -0,0 +1,19 @@
+package org.apollo.game.plugin.detekt.rules
+
+import io.gitlab.arturbosch.detekt.test.lint
+import java.nio.file.Paths
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+
+internal class DeclarationInScriptRuleTest {
+    val rule = DeclarationInScriptRule()
+
+    @Test
+    fun `Finds warning in script file`() {
+        val srcPath = Paths.get(this.javaClass.getResource("/testData/example.kts").toURI())
+        val findings = rule.lint(srcPath)
+
+        assertEquals(1, findings.size)
+        assertEquals("Declaration of ExampleDeclaration should live in a top-level file, not a script", findings[0].message)
+    }
+}

game/plugin-detekt-rules/src/test/resources/testData/example.kts

@@ -0,0 +1,3 @@
+class ExampleDeclaration {
+
+}