feat: sync comment between tasks & Slack

[mikewuu]

If a task was created via homie in slack, we have a reference to the thread. This means we can

• create 2 way sync between slack and the app
• send a notification when task is closed

[homie-gg[bot]]

Here are some pull requests that might be helpful reference for this task:

• feat: Trello integration
• feat: add the ability to remember slack conversation
• feat(Slack): link PR to messages

[homie-dev-mike[bot]]

Here are some pull requests that might be helpful reference for this task:

• feat(Slack): link PR to messages

[homie-dev-mike[bot]]

Here are some pull requests that might be helpful reference for this task:

• fix(CodeGen): add more logs