Execute `runFlagActions` before `c.Before` about cli

[dearchap]

@axelrindle As of now it is not possible. There has been some discussion on lifecycle hooks for v3. See #1273 . If you have suggestions of how you'd like to improve this behavior it would be great.

[axelrindle]

The concept of lifecycle hooks sounds great to me. I'd like to propose the following:

• beforeFlags (runs before flags are parsed)
• afterFlags (runs after flags are parsed, but before commands are run)
• beforeCommand (runs before command actions are run; maybe merge with the previous?)
• afterCommand (runs after a command action has been run)

[dearchap]

@axelrindle I'm going to move this conversation to #1273 and close this issue