Pandapipes

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- [ADDED] heat_consumer plotting
- [ADDED] variable "u_w_per_m2k" to std_type pipe
- [ADDED] standard district heating pipe types
- [ADDED] support for Python 3.12
- [ADDED] t_outlet_k to result tables of branch components
- [ADDED] relying tests, to check the ability to work with pandapower develop
- [ADDED] bidirectional calculation mode for heat calculations
- [CHANGED] heat_consumer to enable temperature control
- [CHANGED] switched from setup.py to pyproject.toml
- [CHANGED] variable "alpha_w_per_m2k" to "u_w_per_m2k"
- [CHANGED] option "all" for pipeflow heat calculations to "sequential", the new option is "bidirectional"
- [CHANGED] volume flow in result tables instead of normalized volume flow for non gas fluids
- [CHANGED] introduction of slack mass flow into nodes as solved variable
- [CHANGED] circulation pumps are now branches and thus cannot generate or consume mass
- [FIXED] Pressure plot not working for circ pump
- [FIXED] volume flow rate for incompressible fluids based on real density, thus in this case results are renamed from "vdot_norm_m3_per_s" to "vdot_m3_per_s"
- [FIXED] some imports from pandapower
- [FIXED] NAN to nan because of numpy changes
- [FIXED] if velocity in a branch is negative to get corrected nodes from the branch pit
- [FIXED] plot pressure profile not working for circulation pump sources
- [FIXED] Infeed switches are considered correctly
- [FIXED] Heat consumers with qext_w = 0 and temperature control ignore temperature set points
- [FIXED] alpha also applied to mdot
- [REMOVED] support for Python 3.8 due to EOL

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- [ADDED] function for plotting pressure profile
- [ADDED] function for calculating distance to junctions
- [ADDED] topology function for returning unsupplied junctions
- [ADDED] topology function for returning elements on path
- [ADDED] function for getting all branch-component table names
- [ADDED] function for getting all branch-component models
- [ADDED] component 'heat_consumer' that combines the two components heat_exchanger and flow_control
- [CHANGED] moving generalizing pit entries up from specific components to the abstract class
- [CHANGED] 'JAC_DERIV_DT1' to 'JAC_DERIV_DTOUT'
- [CHANGED] solving for minit instead of vinit
- [CHANGED] distinct max. iteration settings for hydraulic and thermal calculation
- [CHANGED] default tolerances from 1e-4 to 1e-5
- [FIXED] results of old grid are wrong, pipeflow needs to be conducted again
- [FIXED] taking norm density instead of real density in Darcy-Weisbach equation
- [FIXED] in circulation pumps only junctions in-service are considered

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- [ADDED] multiple creation of heat exchanger
- [ADDED] support Python 3.11 (now included in test pipeline)
- [ADDED] after the connectivity check, intercept the pipeflow if no more nodes are in-service (heat and hydraulic)
- [ADDED] adding biomethane (pure and treated) as additonal fluid
- [ADDED] result tables can be assembled modularly
- [CHANGED] dropped support for Python 3.7 (no longer included in test pipeline)
- [CHANGED] connectivity check now separated by hydraulics and heat_transfer calculation, so that also results can differ in some rows (NaN or not)
- [CHANGED] dynamic creation of lookups for getting pit as pandas tables
- [CHANGED] components can have their own internal arrays for specific calculations (e.g. for compressor pressure ratio), so that the pit does not need to include such component specific entries
- [CHANGED] .readthedocs.yml due to deprecation
- [CHANGED] changing from setuptools flat-layout into src-layout
- [CHANGED] calculate thermal derivative globally, adaptions before/after can be done component-wise
- [CHANGED] moving 'PipeflowNotConverged' error from pipeflow to pipeflow_setup
- [CHANGED] moving 'result_extraction' under pf folder
- [FIXED] in STANET converter: bug fix for heat exchanger creation and external temperatures of pipes added
- [FIXED] build igraph considers all components
- [FIXED] creating nxgraph and considering pressure circulation pumps correctly
- [FIXED] error in tutorial 'circular flow in a district heating grid'
- [FIXED] caused error during 'pip install pandapipes'
- [REMOVED] broken travis badge removed from readme
- [REMOVED] branch TINIT removed as it is not a solution variable, temperature determined on the fly
- [REMOVED] 'converged' setting from options

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- [FIXED] consider ambient pressure in calculation of compression power for pumps/compressors
- [FIXED] np.bool error in pipeflow calculation due to deprecation of np.bool
- [FIXED] use igraph package instead of python-igraph (has been renamed)
- [ADDED] gas specific calculation of heat capacity ration kappa = cp/cv (for pumps/compressors)
- [REMOVED] Python 3.7 removed from test pipeline due to inconsistencies with pandapower

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- [FIXED] added flow control to nxgraph
- [FIXED] in case of multiple pumps, there was a bug when calculating pressure
- [FIXED] if all pumps are out of service, the pipeflow did not converge
- [FIXED] remove unnecessary checkout in release.yml and tutorial tests

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- [FIXED] inconsistency between testpypi and pypi