Auto-run 'task annotate' on missing annotations
Currently, to add a text file with notes for a task, one has to run two commands, `task annotate` and `taskopen`. Would it be possible to add an option to automatically create the required annotations (```task 144 annotate Notes```) and then open them in such cases? This would solve the use-case below.
```
➜  ~ task add TEST
Created task 144.
➜  ~ taskopen 144
No compatible annotation found.
```
