* feat: --allow-command configuration restricts available atlantis commands
* add version and approve_policies into allow commands defaults
* allow-commands accept all keyword which allows all commands
* remove redundant nest
* more detail abount allow-commands all keyword
* Update server/events/comment_parser.go
- Use logger for all warnings. Previously we were writing warnings from
cmd/server.go directly to stderr which bypassed our normal log format.
- Add the timezone to log output. This is just really nice to have if
you're looking at old logs.
- Change levels to all be 4 characters: DBUG, INFO, WARN, EROR. This
makes the logs easier to read because it lines up.
- Log when we first receive the request as well as when we send a
response. This makes it easier to see where the request starts and ends.
