feat(eventHandler): Implement updating using event handlers

[kdev]

🔖 Feature description

When updating data in the database may it be via API or directly (definetly not recommended tho) bot data has to be updated instantaniously.
This means that changing e.g. embed content via API should trigger an update on discord meaning this update of content in the database is directly pushed to discord.

✔️ Solution

Tasks

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1. Create some kind of EventHandler class
2. Create some kind of structure to allow for updates (e.g. messages, config, status, nickname, etc...)