This commit adds automatic Intents detection into package bot. When the
Start function is used, the intents will be OR'd after running the
options callback.
This commit also breaks the old "AddIntent" methods to rename them to
"AddIntents" for correctness.
- Add alias parsing to `Context.findCommand`.
- Add new function to `Subcommand`: `AddAliases` that add new alias(es) to command.
- Added `Aliases` property to `MethodContext`