Add methods like `logLik()` etc. for *multinom_weightit* and *ordinal_weightit*?

[strengejacke]

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We started implementing support the WeightIt package in our easystats-eco-system, mainly in insight (https://cran.r-project.org/package=insight) and parameters (https://cran.r-project.org/package=parameters, update to be submitted).

I'd also like to provide support in the performance package (https://cran.r-project.org/package=performance). While this works well for glm_weightit(), the multinom and ordinal regressions don't provide methods like logLik() or AIC() etc. Do you plan to add those methods to the models, too?

Another question would be how the weighting affects R2 measures - if the log-lik is available for, say, multinom, can you use the same pseudo R2 measures (Nagelkerke, Cox & Snell) for multinom_weightit or is it more complicated?