When dates fail to parse, see if we can present info to the user about the problem

[claremacrae]

Description

Currently, when date strings are parsed and presented to users, we just show Invalid date.

It would be a lot more helpful if we could also show what the invalid date was.

Perhaps something like: Invalid date (2022-02-30)

Required Steps

This will meaning finding all references to chrono.parseDate() and chrono.parse() in the code.

There is information in the results about what text was parsed.

It's a bit more complicated because the Tasks plugin then converts the chrono result to Date, losing the text information.

This might be another case where the proposed TaskDate class is useful: #1104

How to Test

Create a task with an invalid due date, e.g. 2022-02-30

For example, copy this line:

- [ ] Do stuff 📅 2023-02-30

Edit the task with 'Create or edit task' and confirm that the original date text is visible somewhere.

The current result is:

View the file in Reading mode, and confirm it shows the date value

Currently:

View the task in a tasks code block, and confirm it shows the date value

Currently: