Introduce Event Services

[Lord-Grey]

Summary

Event Services
Newly introduced Event Service configuration and consistent handling across all components

• Suspend/Resume & Screen Locking support for MaxOS
• Allow to enable/disable suspend & lock on operating system events (Configure for Logon/-off and Screensaver events #1633, Remote Desktop  #1632)
• Scheduled events allowing to suspend,resume, etc. (Auto disabled LED period (on/off hours option) #1088)
• Configurable CEC event handling

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

If changing the UI of web configuration, please provide the before/after screenshot:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing setups:

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's body (e.g. Fixes: #xxx[,#xxx], where "xxx" is the issue number)

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated (docs/docs/en)
• Related tests have been updated

PLEASE DON'T FORGET TO ADD YOUR CHANGES TO CHANGELOG.MD

• Yes, CHANGELOG.md is also updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:
Fixes #1632
Fixes #1633
Fixes #1088