Cannot run make_chiEFTint outside the project directory

[mdavezac]

Running NuclearToolkit outside its repo is likely a standard approach.
However, this is currently not possible because of the default value of inpf in read_LECs! and of the path manipulation therein (to make the tests work).

Since the code does not run currently run as advertised (i.e. as a package rather than a repo), resolving this issue is necessary for openjournals/joss-reviews#4694.

One approach would be to modify the code as follows:

function read_LECs!(LECs,idxLECs,dLECs;initialize=false,inpf="LECs.jl")  
    if initialize
        isfile(inpf) || (inpf = joinpath(@__DIR__, inpf))

    ...
end


function get_fn_LECs(pottype)
    if pottype =="em500n3lo"
        "LECs.jl"
    elseif pottype == "emn500n3lo"
        "LECs_EMN500N3LO.jl"
    elseif pottype == "emn500n4lo"
        "LECs_EMN500N4LO.jl"
    else
        @error "Unknown potential type" pottype
    end
end

Note that using include inside a function is a bit surprising. In general, a function like get_fn_LECs would likely return a data-structure (namedtuple?) rather than a path. It would also either call specialized functions directly for each potential or be itself implemented using multiple dispatch over pottype (assuming pottypes is not a string).