src: introduce yearly notes page

[jpetrina]

Perhaps adding a simple empty notes page might prove as an useful feature. Alternatively, I considered basing the notes page on the Monthly Overview, but it would probably require a new "month list" header subview.

What do you think?

[klimeryk]

👋 Thanks for the suggestion! Could you add more explanation how you'd use this page? Sort of setting goals for the year kind of thing? I'm honestly not that forward-thinking so I'd probably not use it, but I can definitely see it could benefit others.

[jpetrina]

@klimeryk yes, that is exactly right.

Monthly overviews and a blank page for the year seem to work for me the best. I'm still considering weekly overviews as they seem to be fairly compact but day itineraries really overload me.

I suppose this could be feature-creep, but I'm hopeful it might be useful.

[ovidiusoft]

@jpetrina I am having trouble with these changes. I tried to run them locally (both from this PR and from your original fork) and the generated PDF doesn't have a new page or a link to it, as the source code would suggest. Can you check if all the changes you intended made it into the PR? A screenshot of what the result would look like would be great as well, thank you!

Later edit: Nevermind, I managed to run from the wrong directory / my own branch, not from your changes 🤦 It works as expected, a blanc page appeared after the yearly calendar page, and is properly linked.