Orphaned notes

[leonhfr]

Closes #367

Summary

This PR adds an Orphans panel that references all notes that have neither backlinks nor forward links.

There are two new settings:

• foam.orphans.exclude: exclude some repositories from the orphans report (for example, excluding the /journal for daily notes)
• foam.orphans.groupBy: either group orphans by folder, or not at all, defaults to folder. The orphans are then sorted alphabetically.

I had a first iteration that allowed creating an orphans.md note with a command. However, it feels redundant with the panel, which also has the advantage of self updating, so I think we could leave that part of the issue out.

Todo

• Update documentation/recipe
• Testing

Screenshot

Updating the groupBy setting on the fly (does not overwrite settings.json):

Toggle using the tree list / tree flat icons:

[riccardoferretti]

This looks amazing! I left a few questions, in general I prefer it much more to the command approach

[riccardoferretti]

everything looks good, I just left a question around an event listener disposal.
I think we only need tests and adding the feature to the docs - am I missing anything?

[riccardoferretti]

Should add this to the subscription? so the listener is properly disposed

[SanketDG]

This looks great, @leonhfr

I just have concern, does this necessarily need to be a pane, given that this just needs to be checked that whether a note is orphaned or not, can we just do a notification message: These are orphaned notes: <Note1> <Note2>

Panes, I personally feel, are for introspection and browsing. Given we willl have Backlinks, Tag Explorer, and Outline in any Foam setup do we need one more?

[leonhfr]

@SanketDG

I think the point is not to check that a given note is orphaned or not, but to be able to reference all current orphans, so they can be discovered / rediscovered / referenced with others. It does make sense then to use a panel instead of message or other solutions.

[riccardoferretti]

Fantastic work!

[riccardoferretti]

@allcontributors add @leonhfr for code

[allcontributors]

@riccardoferretti

I've put up a pull request to add @leonhfr! 🎉