Add a utilities_BaRatin module into RBaM

[benRenard]

Would provide various BaRatin-related utilities, such as:

1. Import BaRatin Hydraulic configs from a BaRatinAGE .bam file (Would essentially involve retrieving, for each config, the control matrix and the priors)
2. Deduce the prior on 'a' from the priors on physical parameters K, S, B (channel) or C/g/geometry (weir).
3. More generally, implement a function to do a Monte Carlo uncertainty propagation for any formula given as input + another function to fit prior distributions on these Monte Carlo simulations
4. Provide a dataset or a function (or a mini-shiny app?) to get friction using the Chow's approach
5. Provide a function (or a mini-shiny app?) to get friction using Cowan's formula
6. others?

@Felipemendezrios, @JeromeLeCoz, @MartinMorlot, for your information since we discussed some of these things recently