Add a command for bulk adding search results

[linduxed]

Currently the search results can be added to a queue by clicking the button that is added to the search sidebar section.

The code can be found here: https://github.com/bjsi/incremental-writing/blob/91126fe1665e7dd6d1e07f6aafc1c905cb374ce6/src/main.ts#L226-L241

Currently this functionality is not available, as this has not been added as a "command", like this: https://github.com/bjsi/incremental-writing/blob/91126fe1665e7dd6d1e07f6aafc1c905cb374ce6/src/main.ts#L263-L268

Is this something that would be interesting to add?