Hello!

This PR closes #140 thanks @thisnugroho for the feature request.

We have added a first steps into rule management and generation.
The main features are:

• Moved config.rs to appconfig.rs This will resolve some naming conflict.
• Moved init function to init.rs module this will allow to manage initialization in a better way.
• Added regex crate as a new dependency.
• Updated OpenSearch index template to reflect rule event attributes.
• Added rules.yml template, where your rules will be included.
• Manage rules file as a configuration file in the package management system.
• Moved TMP_EVENTS static mutable variable to Arc<Mutex> inside appconfig. This will allow to remove unsafe blocks and use a 'singleton' configuration file.
• Include rule event triggering inside Monitor Event and Audit Event.
• Added Event generic file where the trait is defined, later coded in each module.
• Moved Event to MonitorEvent module.
• Now rotator module contains a configuration instance with all shared variables and previously mentioned mutex.
• Added ruleevent.rs file that manage Rule Event attributes and processing.
• Added ruleset.rs file that manage regexes and rule triggering.
• Fixed Windows service logging error.
• Improved message logging and reporting.
• Minor improvements into automatic testing.