Create pyomo_universal_pwl_format.py

[al-drm]

Fixes # .

Summary/Motivation:

pyomo_universal_pwl_format.py demonstrates concept of new universal human readable format for function approximation in PYOMO for: 1) stationary process modeling subblocks (for nonlinear system of equations) 2) state estimation (process data reconciliation) and gross error detection

Function "mesh block" builds PYOMO concrete model from df_PWL. Returned by "mesh block" PYOMO model represents the union of convex simplexes. Can be use to model even discontinuous functions and nonzero volume domains.

Function argument df_PWL - dataframe representing uneversal format for PWL approximation: 1) vertexes are index by rows 2) columns till last - vertex coordinates 3) last column - list of simplex numbers, that includes rows vertex

Changes proposed in this PR:

• New folder "universal pwl forma" in https://github.com/Pyomo/pyomo/tree/main/examples containing pyomo_universal_pwl_format.py example

Legal Acknowledgement

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1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[blnicho]

Could you please provide a description of what this is, what it does, and why it belongs in Pyomo?

[al-drm]

Thank you @blnicho for reply. I've provided basic description above