Add gitignore and improve support for Eclipse and VSCode

.gitignore

@@ -1,12 +1,25 @@
-/.idea/
+## Gradle
 /.gradle/
 /buildSrc/.gradle/
 /build/
 /buildSrc/build/
+
+## IDEA
+/.idea/
 /out/
+
+## Eclipse
+.settings/
+.classpath
+.project
+bin
+
+## VSCode
+.vscode
+
+## Common
 /testData/classes/java*/
 /testData/classes/jasm/
 /testData/classes/groovy/
 /testData/classes/kt/
-/testData/classes/scala/
-bin
+/testData/classes/scala/

build.gradle

@@ -39,6 +39,7 @@ allprojects {
   dependencies {
     implementation 'org.jetbrains:annotations:24.0.0'
     testImplementation("org.junit.jupiter:junit-jupiter-api:${project.junit_bom}")
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${project.junit_bom}")
   }
 
@@ -217,6 +218,12 @@ jar {
   }
 }
 
+// If testFixtures can't be inferred from the build path, it'll need to be manually specified to be able to find
+// the test fixtures class. Put it in a unique place to mark it as such.
+testFixturesJar {
+  destinationDirectory = file("$rootDir/build/extralibs")
+}
+
 task sourceJar(type:Jar) {
   archiveClassifier = "sources"
   from sourceSets.main.allSource