Gradle Cleanup

[slava110]

• Changed mappings to parchment. Will provide more Javadoc & better parameter names
• Removed unused gradle properties
• Removed useless comments
• Different run folders for different configurations
• Removed maven-publish as we're not using maven publishing
• Updated org.gradle.toolchains.foojay-resolver-convention to 0.8.0 (0.5.0 is buggy on some machines)