[csolution] add_path: duplicate paths not checked, absolute paths not added

[ReinhardKeil]

A *.cproject.yml that contains the following add-path:

  setups:
    - setup: Options for Target_1
      processor:
        fpu: "off"
      add-path:
        - $Pack(Microchip::SAME70_DFP)$/same70b/include
        - C:/Users/reikei01/AppData/Local/Arm/Packs/Microchip/SAME70_DFP/4.11.257/same71b/include

Generates this *.cbuild.yml output:

  add-path:
    - ${CMSIS_PACK_ROOT}/Microchip/SAME70_DFP/4.11.257/same70b/include
    - RTE/CMSIS
    - RTE/_Debug_Target_1
    - ${CMSIS_PACK_ROOT}/ARM/CMSIS-RTX/5.9.0/Include
    - ${CMSIS_PACK_ROOT}/ARM/CMSIS/6.1.0/CMSIS/Core/Include
    - ${CMSIS_PACK_ROOT}/ARM/CMSIS/6.1.0/CMSIS/RTOS2/Include
    - ${CMSIS_PACK_ROOT}/Microchip/SAME70_DFP/4.11.257/same70b/include     # !!! Duplicate

It has:

• a duplicate path name (which is flagged by the schema)
• misses the absolute include path C:/Users/reikei01/AppData/Local/Arm/Packs/Microchip/SAME70_DFP/4.11.257/same71b/include

The warning csolution: absolute path 'C:/Users/reikei01/AppData/Local/Arm/Packs/Microchip/SAME70_DFP/4.11.258/same70b/include' is not portable, use relative path instead is informative, but still the path should be in cbuild.yml add-path:.

To Reproduce

Use test.zip and use cbuild test.csolution.yml --context-set

Environment:

• CMSIS-Toolbox 2.7.0
• OS: Windows