Show bgee version within the R package

[jwollbrett]

The bgee version should be shown within the R package (in results, before starting, ...)

[jwollbrett]

We could use the "messageToUsers" column in the release_v2.tsv file to show the Bgee version.
For the moment this column is only used to show warning. e.g "Be careful! You are not using the last release of the Bgee database! " is shown to user of bgee 13.2.

[julien-roux]

This info could/should indeed be printed to the user, but there no need to use the "messageToUsers" field I think (we could just print out systematically the variable including the bgee release number). Of course this involves updating the package and will not work for users that are not up to date... But these are not following good practices and can be prevented to use the last version of Bgee

What do you think?