[feat] Allow customization of display date format

[rochacbruno]

The dates shown in list.html and content.html takes a string format.

That format must be configurable

marmite.yaml

output_date_format: "%D/%M/%Y"

Check chrono for valid options, invalid date must raise error.

[!IMPORTANT] This has nothing to do with the input_date_format on get_date function, those are fixed and can't be changed, this issue is only about adding to config and using on templates.

[brunobarros2093]

Hi @rochacbruno, how you doing? I would like to work on this issue or at least help to solve it, but I am new to Rust, how fast do you want it to be fixed? I may take a while (like a week or two alone - maybe little exageration here)

[rochacbruno]

Take your time @brunobarros2093 , I can give you some directions.

• Add output_date_format to the Marmite struct on config.rs along with its default function, the default function will return a String containing "%b %e, %Y" which is the default format.

• Then users will be able to add output_date_format: "other format" (https://docs.rs/chrono/latest/chrono/format/strftime/index.html)

• Then change templates, wherever there is a | date(format="...") replace with | date(format=site.output_date_format)

I think that is all.