Implement what is necessary to make a list of jobs offering

[pedrogit]

Schema should look like this:

title: string, description: {type: linkorfile, filetype: pdf}, organism: string, lieu: string, date_parution: {type: date, default: creation_day}, date_limite: {type: date, options: ["Non déterminé", "Dès que possible"], default: "Non déterminé"},

1- Be able to upload a file secured according to the list permissions.
2- Develop a link component able to edit the string and link to a page or upload a linked file.
3- Be able to initialise a date and set it.
4- Support date additional options (array of text, today)
5- Have a boolean component displaying an uploaded image (when set) or not (when unset).