Add org wild notifier to org layer

[dalanicolai]

This PR replaces #14396. See last comments there for motivation.

I've added instructions to use =org-journal-new-scheduled-entry=, assuming that PR numbers 335, 337 and 338 get merged soon.

[smile13241324]

Looks good, apart from that the new package should be deferred.
Can you close your old PR if it is not longer needed?

[smile13241324]

Looks good, will be merged soon.

[smile13241324]

@dalanicolai looks like there are some conflicts in your PR, can you have a look? Especially there is a merge which prevents me from cherry picking your commit. Can you squash/fix the conflicts on your side?

[dalanicolai]

@smile13241324 Ah sorry. I am still no git expert. To create the org-wild-notifier fix, I branched from develop but then I merged from the previous add-notify PR (my previous PR to add add-notify, that I replaced with org-wild-notifier in this PR) so that I did not have to type everything new again. However, I guess I should just have had to use git apply (or use git -reset ^HEAD after the merge). Anyway, I am trying to learn and understand it (but I have only internet as my teacher).

Therewere some more git horrors when I tried to rebase, because somehow it did not leave my 'fix branch' intact. Anyway. I have applied some tricks now to fix it. I hope I have done things more or less correctly now.

Thanks again of course!

[smile13241324]

Thank you for contributing to spacemacs 💜, I have cherry picked your commit into develop.

[dalanicolai]

The documentation part in this PR assumes that bastibe/org-journal#339 got merged, which did not happen yet. But, although I expected it to get merged sooner, I still expect it to get merged very soon (probably before anybody will discover this documentation about those org-journal commands).