@findall macro for multiple IDS objects

[mgyoo86]

Summary

The previous findall method for multiple IDS objects is removed due to the ambiguous type inferences.
Instead, a new @findall macro handles multiple IDS objects by calling the findall function for a single IDS object.
The macro captures the input argument's names and passes them into a new keyword argument of the root_name of the findall function.
This is beneficial for distinguishing different IDS objects more clearly as shown in below.

Existing feature

Existing findall cannot distinguish different IDS objects as it set the root_name by using the location function.
Suppose we have multiple different dd data, such as dd_D3D and dd_FPP.

# The results look the same
findall(dd_D3D, :label)
findall(dd_FPP, :label)

# findall results cannot capture the given variable names
eqt_D3D = dd_D3D.equilibrium.time_slice[]
eqt_FPP = dd_FPP.equilibrium.time_slice[]
findall(eqt_D3D, :psi)
findall(eqt_FPP, :psi)

New feature

eqt_D3D = dd_D3D.equilibrium.time_slice[]
# One can specify the `root_name` as the keyword argument
findall(eqt_D3D, :psi; root_name="eqt_D3D")

# @findall macro can handle multiple IDS objects,
# and use given variable names as root_names
@findall [dd_D3D, dd_FPP] :label

@findall [ dd_FPP, eqt_D3D] r"prof.*1d.*psi$"

Note

New testset for "findall" is implemented.
[v] All tests passed