Actions - Initial Implementation

[benjamin-kirkbride]

Subtask of #1342

Reqs from #1335 (comment)

Requirements:

• actions.py: the action classes, the registry and the related functions
• A few producers (i.e. add an action in a few plugins)
• One consumer

[Akuli]

Here is the old actions.py that I deleted and merged with menubar a few years ago: https://github.com/Akuli/porcupine/blob/3970a8ad898108f4979f2b004bf4be0d32b2e280/porcupine/actions.py

Not sure how useful that will be. It's not very nice, but it does a similar thing to we're planning and could be better than nothing as a starting point. Or maybe it is easier to start from scratch, I don't know :)

[benjamin-kirkbride]

@Akuli with db47f32 this is technically done (pending review ofc), by the requirements that were set out.

From here we could:

• finish the menubar implementation (Actions - menubar #1343)
• work on a different consumer (probably the command palette)
• something else?

Thoughts?

[Akuli]

We basically need more producers (most plugins) and more consumers (key bindings, menubar, command palette, ...). Once actions.py is in place, I think these don't really depend on each other and we can work on whatever we find interesting :)