Remove TableRegressionModel wrapper

[getzze]

See JuliaStats/GLM.jl#339

Also:

• correct loglikelihood formula

[codecov]

Codecov Report

Patch coverage: 86.50% and project coverage change: -0.21 ⚠️

Comparison is base (7505097) 84.87% compared to head (f2857e1) 84.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
- Coverage   84.87%   84.66%   -0.21%     
==========================================
  Files           9       11       +2     
  Lines        1607     1709     +102     
==========================================
+ Hits         1364     1447      +83     
- Misses        243      262      +19     

Impacted Files	Coverage Δ
src/RobustModels.jl	66.66% <ø> (ø)
src/linpred.jl	82.83% <ø> (-0.38%)	⬇️
src/deprecated.jl	44.44% <44.44%> (ø)
src/tools.jl	84.37% <84.37%> (ø)
src/robustlinearmodel.jl	87.78% <89.47%> (-0.25%)	⬇️
src/quantileregression.jl	94.41% <93.10%> (+0.47%)	⬆️
src/linresp.jl	82.90% <95.45%> (-0.61%)	⬇️
src/univariate.jl	94.44% <100.00%> (ø)

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