Feature/disco

[whaeck]

This adds a rewrite of the original disco library in the tools library. One of the reasons for integrating this into into the tools library is to reduce the number of dependencies in the njoy libraries. This effectively replaces a larger number of dependencies to a single one (previously we had Log, disco, range-v3 which are now replaced by a single tools dependency).

Another reason for the update to disco was to use std::from_chars instead of the original disco floating point parsers. The original parsers had a tendency to be "off" by a very small epsilon. For example: "1.0000000000E-11" got interpreted as 9.99999999999e-12 or 2.00000000E+00 as 1.9999999999999. That was a problem.
We opted to use the fast_float::from_chars function instead of the std::from_chars since not every compiler/standard library properly implemented the from_chars function (LLVM and clang do not have the floating point version of from_chars). The fast_float library is actively maintained and is the implementation used in gcc-12 for from_chars, hence we adopted that implementation.

The original disco interface is maintained so the impact on ENDFtk and ACEtk will be minimal. We expect performance improvements and fixing the above mentioned issue when this version of tools gets integrated into ACEtk and ENDFtk.