Allow timestamp format styles in embed footers

[cakedan]

Theres two ways that this feature can be implemented, either add a new property to the embed, something like timestamp_style OR allow parsing of the timestamp format in the footer text (https://discord.com/developers/docs/reference#message-formatting-formats). Right now the timestamp defaults to the relative format which is great in itself, but for more details dates (like logs), this is lackluster.

I currently have people set their timezone(or default to EST) for my bot's timestamp formats and format the dates myself, but the problem is that it doesn't support per-client timezones. Would love to take advantage of per-client timezones using discord's own timestamp formatting in the footer.

My current implementation:

I for one think that allowing parsing inside of the footer text would be best since it'll allow for more customization.

[advaith1]

more generally, it could just support all markdown/formatting (including timestamps)