Consider Adaptive Damping based on chi-squared reduction ratio

```
            // TODO: Consider Adaptive Damping based on chi-squared reduction ratio
```

In file include/lm_solver.cpp
https://github.com/Vikt0rG/MyFit/blob/709aed8a3e41b34a1c6cae52ebc59d31c1859019/include/lm_solver.cpp#L235