[TASK] index dimensionsCombinations especially languages

mainly same functionality like in https://github.com/kitsunet/Flowpack.SimpleSearch.ContentRepositoryAdaptor
[TASK] adjustment to renaming

languages in dimensions is now called language
[FEATURE] indexing dimensions 'not_analyzed'
Merge pull request #30 from mgoldbeck/dimensions

[TASK] index dimensionsCombinations especially languages