Is your feature request related to a problem? Please describe.
hydrolib-core currently supports cross section location and definition files in the .ini format.
However, several model schematizations exist that still use the legacy "profloc/profdef" files.
It would be nice to able to easily switch to the new format.

Describe the solution you'd like

• A python script that converts profloc + profdef files into crsloc/crsdef.ini files
• Should be callable as a function and as a standalone script
• Input arguments are:
  • either the profloc + profdef + (optionally!) profdefxyz files
  • or an .mdu file, from which the prof* files will be detected
• the legacy formats do not need to become available as Pydantic model classes, a simple file reader inside this utility will suffice.
• Error must be given if user input is wrong
• Error must be given if some fields in user input are not (yet) supported in converter

Additional context
Format definition of legacy files:
profloc.xyz

• in fact a sample file (hydrolib.core.dflowfm.XYZModel)
• the third (z) column should contain numbers, whose integer value corresponds with the PROFNR= profile definition numbers in a profdef.txt

profdef.txt

• Comment lines start with *
• Data lines contain a space-separated list of key=value terms
• Valid keys:
  • PROFNR=<N>, profile id, with N positive integer. Referenced by z-column in profloc.xyz file
  • TYPE=<itype>, profile type, one of:
    • TYPE=1 : PIPE
    • TYPE=2 : RECTAN , HYDRAD = AREA / PERIMETER ALSO SPECIFY: HEIGHT=
    • TYPE=3 : RECTAN , HYDRAD = 1D ANALYTIC CONVEYANCE = WATERDEPTH ALSO SPECIFY: HEIGHT=
    • TYPE=4 : V-SHAPE , HYDRAD = AREA / PERIMETER ALSO SPECIFY: HEIGHT=
    • TYPE=5 : V-SHAPE , HYDRAD = 1D ANALYTIC CONVEYANCE ALSO SPECIFY: HEIGHT=
    • TYPE=6 : TRAPEZOID, HYDRAD = AREA / PERIMETER ALSO SPECIFY: HEIGHT= BASE=
    • TYPE=7 : TRAPEZOID, HYDRAD = 1D ANALYTIC CONVEYANCE ALSO SPECIFY: HEIGHT= BASE=
    • TYPE=100: YZPROF , HYDRAD = AREA / PERIMETER
    • TYPE=101: YZPROF , HYDRAD = 1D ANALYTIC CONVEYANCE METHOD
    • TYPE=200: XYZPROF , HYDRAD = AREA / PERIMETER
    • TYPE=201: XYZPROF , HYDRAD = 1D ANALYTIC CONVEYANCE METHOD
  • WIDTH=<w> with w a positive float equals the (top) width
  • HEIGHT=<h> with h a positive float equals the height
  • ZMIN=<z> with z a float equals the absolute bed level of the cross section
  • BASE=<wb> with wb a positive float equals the base width
  • TALUD=<s> with s a positive float equals the talud slope. Used when BASE is omitted for trapezoid type.
  • FRCTP=<ifrctp> with ifrctp the integer friction type on this cross section (See translation below)
  • FRCCF=<cf> with cf a positive float equals the friction coefficient

Translation friction types:
0: Chezy
1: Manning
2: WallLawNikuradse (a.k.a. White-Colebrook Delft3D-style)
3: WhiteColebrook

profdefxyz.pliz

• in fact a polyline file (hydrolib.core.dflowfm.PolyFile)
• multiple polylines in single file
• polyline label equals PROFNR=<N>, should match with profdef.txt file
• x,y,z columns simply form a xyz profile geometry