fix: Refactored to Gradle-based project, and added dependencies

.gitignore

@@ -1,120 +0,0 @@
-## Java
-
-*.class
-*.war
-*.ear
-hs_err_pid*
-
-## Robovm
-/ios/robovm-build/
-
-## GWT
-/html/war/
-/html/gwt-unitCache/
-.apt_generated/
-.gwt/
-gwt-unitCache/
-www-test/
-.gwt-tmp/
-
-## Android Studio and Intellij and Android in general
-/android/libs/armeabi/
-/android/libs/armeabi-v7a/
-/android/libs/arm64-v8a/
-/android/libs/x86/
-/android/libs/x86_64/
-/android/gen/
-.idea/
-*.ipr
-*.iws
-*.iml
-/android/out/
-com_crashlytics_export_strings.xml
-
-## Eclipse
-
-.classpath
-.project
-.metadata/
-/android/bin/
-/core/bin/
-/desktop/bin/
-/html/bin/
-/ios/bin/
-*.tmp
-*.bak
-*.swp
-*~.nib
-.settings/
-.loadpath
-.externalToolBuilders/
-*.launch
-
-## NetBeans
-
-/nbproject/private/
-/android/nbproject/private/
-/core/nbproject/private/
-/desktop/nbproject/private/
-/html/nbproject/private/
-/ios/nbproject/private/
-
-/build/
-/android/build/
-/core/build/
-/desktop/build/
-/html/build/
-/ios/build/
-
-/nbbuild/
-/android/nbbuild/
-/core/nbbuild/
-/desktop/nbbuild/
-/html/nbbuild/
-/ios/nbbuild/
-
-/dist/
-/android/dist/
-/core/dist/
-/desktop/dist/
-/html/dist/
-/ios/dist/
-
-/nbdist/
-/android/nbdist/
-/core/nbdist/
-/desktop/nbdist/
-/html/nbdist/
-/ios/nbdist/
-
-nbactions.xml
-nb-configuration.xml
-
-## Gradle
-
-/local.properties
-.gradle/
-gradle-app.setting
-/build/
-/android/build/
-/core/build/
-/desktop/build/
-/html/build/
-/ios/build/
-/server/build/
-/shared/build/
-
-## OS Specific
-.DS_Store
-Thumbs.db
-
-## iOS
-/ios/xcode/*.xcodeproj/*
-!/ios/xcode/*.xcodeproj/xcshareddata
-!/ios/xcode/*.xcodeproj/project.pbxproj
-/ios/xcode/native/
-/ios/IOSLauncher.app
-/ios/IOSLauncher.app.dSYM
-
-## Project Files
-history.txt

build.gradle

@@ -0,0 +1,26 @@
+plugins {
+    id 'java'
+    id 'idea'
+}
+
+repositories {
+    mavenCentral()
+    jcenter()
+}
+
+test {
+    useJUnitPlatform()
+
+    maxParallelForks = 8
+}
+
+dependencies {
+    implementation "com.fasterxml.jackson.core:jackson-core:2.12.3"
+    implementation "com.fasterxml.jackson.core:jackson-annotations:2.12.3"
+    implementation "com.fasterxml.jackson.core:jackson-databind:2.12.3"
+
+    testImplementation "org.junit.jupiter:junit-jupiter-api:5.8.0-M1"
+    testImplementation "org.mockito:mockito-all:2.0.2-beta"
+    testImplementation "org.assertj:assertj-core:3.19.0"
+    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.8.0-M1"
+}

src/main/java/uulm/teamname/marvelous/gamelibrary/json/CharacterConfiguration.java

@@ -0,0 +1,4 @@
+package uulm.teamname.marvelous.gamelibrary.json;
+
+public class CharacterConfiguration {
+}