Work on the "RequiredFormat" function

[ValentineHerr]

We decided the equivalent of the current RequiredFormat function will be the first function used by the user/Shinny app.

Technically it should be split in at least two functions:

1. RequiredFormat_interaction:

which will will ask the user:

• [ ] column names to standardize name equivalences
• [ ] extra info needed and not stored in columns

---> same info is asked by Shiny app ATTENTION: ANYTHING ASKED in SHINY APP SHOULD BE ENTERED IN THIS FILE (which I may need to move - also I could try to use that file to generate what is asked in RequiredFormat_interaction... I need to look into it).

The output should be a list containing things like column names equivalences and values for arguments need in other "calcul" functions

2. RequiredFormat_calcul

which will take the output of RequiredFormat_interaction and:

• [ ] transform the format to a long format if necessary
• [ ] rename the column to the standard names
• [ ] add/populate necessary columns (making sure the user knows about that)
• [ ] make unit conversions
• [ ] ...

The output of RequiredFormat_calcul is a data.table in [this]([@VincyaneBadouard: please insert link to a RData file that is in perfect format for your functions]) standardize format, which is the format used by all other functions (mainly developped by @VincyaneBadouard).

(@VincyaneBadouard feel free to edit to add to the lists + add what you think is important for this function)

[ValentineHerr]

closing this issue as it is covered in issue #9