Merge pull request #15890 from mantidproject/15771_algorithm_GSASIIFitPeaks

...ythonInterface/plugins/algorithms/EnggFitDIFCFromPeaks.py

Framework/PythonInterface/plugins/algorithms/EnggFitPeaks.py

...ythonInterface/plugins/algorithms/GSASIIRefineFitPeaks.py

...onInterface/test/python/plugins/algorithms/CMakeLists.txt

...est/python/plugins/algorithms/GSASIIRefineFitPeaksTest.py

docs/source/algorithms/GSASIIRefineFitPeaks-v1.rst

docs/source/release/v3.7.0/diffraction.rst

docs/source/release/v3.7.0/framework.rst