refactor: split group and direct conversation into their own struct

[dariusc93]

What this PR does 📖

• split group and direct conversations into their own structure.
• remove redundant functions

Which issue(s) this PR fixes 🔨

Special notes for reviewers 🗒️

• this would be considered a breaking change

Additional comments 🎤

• this change would prep for merging common logic between direct, group and communities to reduce codebase.
• later change may split the task into up so one would handle direct conversations and groups to reduce logic.
  • this might still result in duplicated code, although we could process the common events in a single function with the conversation specific events being pushed into its respected function