refactor(date): Refactor date object

[kristijanhusak]

No description provided.

[kristijanhusak]

@chipsenkbeil Just letting you know about this refactor in case you notice anything strange in org-roam.
Everything should work as usual. I have just rewritten a few things to make more sense.
There are a few "breaking"changes:

1. Date.today() now has a timestamp with the start of today (00:00). Previously, timestamp was also considering the current time. Formatting worked ok because of the date_only flag, but if you would access the timestamp directly, it wouldn't reflect that. Same thing for Date.tomorrow()
2. Date comparison (:is_before(), etc.) now considers the date_only flag, and sets the timestamp to the start of day in case that flag is set on a specific date.

I took a quick look at org-roam and I think none of these things affect you, but wanted to let you know anyway.

[chipsenkbeil]

There are a few "breaking"changes:

1. Date.today() now has a timestamp with the start of today (00:00). Previously, timestamp was also considering the current time. Formatting worked ok because of the date_only flag, but if you would access the timestamp directly, it wouldn't reflect that. Same thing for Date.tomorrow()

Good to know! I make use of the timestamp field within the extensions/dailies.lua code. It's only used to replace date variables within templates, which being based on calendar dates I wouldn't expect the time component to matter. Having it start at the beginning of the day is a better behavior from my perspective.