[LUA API] Rest of general functions assignment

[JimB40]

So after implementing new functions groups #777 #782 #783 and moving some functions to appropriate groups #784 there 2 few left in General

1. killEvents() We may leave it in General or create inputs.* group and move it there with getRotEncSpeed()

2. loadScript() We may leave it in General or create lua.* group and move it there with getAvailableMemory(),getUsage()