tree-wide: add support for Function Group Include CRUD

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (96b4600) 98.29% compared to head (8626b17) 98.30%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #124 +/- ## ======================================= Coverage 98.29% 98.30% ======================================= Files 86 86 Lines 8508 8539 +31 ======================================= + Hits 8363 8394 +31 Misses 145 145 ``` | [Files](https://app.codecov.io/gh/jfilak/sapcli/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jakub+Filak) | Coverage Δ | | |---|---|---| | [sap/cli/function.py](https://app.codecov.io/gh/jfilak/sapcli/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jakub+Filak#diff-c2FwL2NsaS9mdW5jdGlvbi5weQ==) | `98.83% <100.00%> (+0.65%)` | :arrow_up: |

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[jfilak]

Well done!