Be more resilient of user errors

[srid]

neuron rib -w should continue to run instead of breaking abruptly when there is an issue in one of zettel files. This can include:

• Invalid markdown syntax (parser fails)
• Invalid yaml metadata block
• Links to non-existent zettel

Instead, perhaps, an inline error should be rendered in the zettel HTML in additional to accumulating all these errors and displaying them on the terminal (while continuing to monitor files for changes).

[Nadrieril]

It might also be interesting to list the zettels with errors at the top of the z-index or some other relevant location

[srid]

[srid]

Invalid markdown syntax (parser fails)
Invalid yaml metadata block

When this happens, the entire zettel will be discarded from the zettelkasten; but the terminal will display an error.

[srid]

But these errors (not the query errors) will be shown in the z-index

[srid]

Actually let's display them all in the z-index: