To clear caches :-

PubgUtils utils = new PubgUtils(this,PubgUtils.GLOBAL);
utils.clearCache(); 

// or utils.clearData() ;to delete all the data of the game

To run a cpp :-

utils.runCPP(getExternalFileDir(null) + "/aimbot.cpp");

// or utils.runShell("su"); to execute a shell command

Add maven to your root build.gradle (Project level)

allprojects {
	repositories {
		...
		maven { url 'https://jitpack.io' }
	}
}

Add the dependency (Module level)

dependencies {
	    implementation 'com.github.ErrorxCode:PubgUtils:1.5'
}

Javadocs

A. No, this library is only for files modifications. You can build Mod data tool but not ESP.

A. Yes, you will be banned if caught for cheating.

A. Not a valid question. This totally depends on the type of cheat & the files or code you used. Again, this library do not provide any type of cheat or mod files. this only make your work easy nothing else.