Add community alerts/collectors to repo

[odyslam]

• [ ] Define community collectors
• [ ] Define community alerts
• [ ] clone files to community repo
• [ ] remove files from main repo

repo structure

• apps/ --> applications building on or extending netdata (e.g netdata-api, configuration management, etc.)
• collectors/plugin/module/* --> source files for the particular collector as exists in the respective directory now
• collectors/.plugin./.module./module.yaml --> a yaml file describing the module. It will be used by the marketplace website
• alerts/module/alert.conf --> a conf file with a single alert definition. This will be appended into the alert file for the particular module. It enables us to have multiple alerts for the same module, without overloading a single configuration file.
  • example: /geth/goroutines.conf, /geth/chainhead.conf

[andrewm4894]

I think this makes sense. Starting with an example then will make is easy too. I guess each collector should have a README too when with instructions of how to install and any other notes etc.