This PR exports recently added RateHelpers in QuantLib to QuantLibAddin.
I also updated the curve calibration example sheet to illustrate the usage of the rate helpers.
The PR is for branch v1.23.x because this branch seems to be the most recent branch. Maybe it makes sene to first merge branch v1.23.x to master and then apply the commit to master branch.
This PR exports recently added RateHelpers in QuantLib to QuantLibAddin.
I also updated the curve calibration example sheet to illustrate the usage of the rate helpers.
The PR is for branch v1.23.x because this branch seems to be the most recent branch. Maybe it makes sene to first merge branch v1.23.x to master and then apply the commit to master branch.
Please let me know if any comments or questions.