[Enhancement] Adding configuration options for project tasks

[jalinei]

Hi,

I was recently looking for a way to configure which project tasks are shown in the platformio vscode extension. From my understanding, it turns out there is no way to configure it because it seems to be hardcoded in here : https://github.com/platformio/platformio-node-helpers/blob/master/src/project/tasks.js

To illustrate a bit better the use case here is a screenshot of what we are working on :

We've added custom actions that permits to load examples in one click for inexperienced users. Multiple environments can load different example, so that's great. The proposed enhancement would give the possibility to hide few actions shown by default that make that menu tough to understand from an ergonomic standpoint for newcomers.

The icing on the cake would be to add a way to have sub-groups as well, so actions could be sorted out on a finer grain.

Does that make sense ?