Add basic show for ModelWithResult

[stelmo]

julia> res = flux_balance_analysis(model, Tulip.Optimizer)
ModelWithResult{Model}(COBREXA.Types.ObjectModel, ...)

[codecov[bot]]

Codecov Report

Base: 89.25% // Head: 89.26% // Increases project coverage by +0.00% :tada:

Coverage data is based on head (c44792e) compared to base (50b9c6c). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## next #766 +/- ## ======================================= Coverage 89.25% 89.26% ======================================= Files 93 94 +1 Lines 2373 2375 +2 ======================================= + Hits 2118 2120 +2 Misses 255 255 ``` | [Impacted Files](https://codecov.io/gh/LCSB-BioCore/COBREXA.jl/pull/766?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore) | Coverage Δ | | |---|---|---| | [src/io/show/ModelWithResult.jl](https://codecov.io/gh/LCSB-BioCore/COBREXA.jl/pull/766?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore#diff-c3JjL2lvL3Nob3cvTW9kZWxXaXRoUmVzdWx0Lmps) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore)

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