<b>Required scope: </b><code>tasks:write</code> Adds the task to the specified project, in the optional location specified. If no location arguments are given, the task will be added to the end of the project. `addProject` can also be used to reorder a task within a project or section that already contains it. At most one of `insert_before`, `insert_after`, or `section` should be specified. Inserting into a section in an non-order-dependent way can be done by specifying section, otherwise, to insert within a section in a particular place, specify `insert_before` or `insert_after` and a task within the section to anchor the position of this task. A task can have at most 20 projects multi-homed to it. Returns an empty data block.