added option to guess slider valve types

[codecov[bot]]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (6f67869) 85.11% compared to head (6977435) 85.01%.

Files	Patch %	Lines
pandapipes/converter/stanet/table_creation.py	73.07%	14 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #577 +/- ## =========================================== - Coverage 85.11% 85.01% -0.10% =========================================== Files 90 90 Lines 6173 6200 +27 =========================================== + Hits 5254 5271 +17 - Misses 919 929 +10 ```

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