feat: add a parser for `date_as_french` in discussions

[Vexcited]

Output is very variable, see example below. Because of this behavior, we can't transform this into a date.

Output example :

"lundi 08h53"

or can just be the hour :

"07h26"

[Gabriel29306]

Hi, I can see that a wrapper already exist at src/decoders/pronote-date.ts which is decodePronoteDate, isn't like you want ?

[Vexcited]

Hi, I can see that a wrapper already exist at src/decoders/pronote-date.ts which is decodePronoteDate, isn't like you want ?

No, decodePronoteDate is for dates formatted as dd/mm/yyy [HH:MM[:SS]] as I remember. It is not done for the purpose described in the issue description.