Update manpage to include sort-order for various reports

Taskwarrior comes with many different reports, described in the manpage, but only `task next` and `task ready` mention the sort order. Reports like list, long, ls, minimal are not only different field layouts, but perhaps more importantly, different sort directives, and the utility of this might be discoverable in the manpage, if the sort-orders were mentioned.

For example;
```
task all
Shows all tasks matching the filter, including parents of recurring tasks, sorted by date of entry.
task list
Provides a standard listing of tasks matching the filter, sorted by started, due-date, project then urgency.
task long
Provides the most detailed listing of tasks matching the filter, sorted by most recently modified.
task ls
Provides a short listing of tasks matching the filter, sorted by started then description.
task minimal
Provides a minimal listing of tasks matching the filter, sorted by project then description.
```