Parsing Quantity from string representation

[JuliaSprenger]

Sometimes it is necessary to create a Quantity objects from a plain string representation, e.g. like 3.0 ms or [3 4 5] ms. Parsing these strings in each use case is error prone and it would be nice to have a more generic function provided, e.g. like the one provided by the R quantities package, see https://www.r-spatial.org/r/2018/05/07/parsing-quantities.html#a-flexible-errors-parser.

A first step towards a generic parsing would be the capability of parsing the string representation of a quantity to have a closed loop between the quantity object and it's string representation. Potentially some code used by the R quantities package could be used as inspiration here, like script1 and script2.

[torokati44]

+1
EDIT: A really basic version could be something like this: https://gist.github.com/torokati44/5866f6e9b27190dc219e29fdc71d8a0e