FEAT: /incident to not automatically set the title

[gcharest]

• /incident calls the create modal immediately and uses the body of the command as title
• /sre incident provides more functionalities such as setting the roles of incident commander or archiving the slack channel.

Probably should behave the same way if the user calls the slash command with specific keywords like close/roles or be context aware, i.e. if in a incident channel, the incident command would provide commands related to managing the incident itself