[DOCS] Improve documentation on FilesProcessor

[kitzberger]

I've struggled today with the fact that if I want to use cObjects for the processingConfiguration properties then I have to provide a dummy value first.

lib.image.dataProcessing.10 = FriendsOfTYPO3\Headless\DataProcessing\FilesProcessor
lib.image.dataProcessing.10 {
   processingConfiguration {
      # Simple static value
      width = 800

      # Using stdWrap override
      width = 800
      width.override = 1200

      # This works by accident because "data" is a stdWrap property and TEXT is just treated as the dummy value but NOT as the TextContentObject
      width = TEXT
      width.data.field = imagewidth

      # This doesn't work for "value" is not stdWrap property, so this just stays "TEXT"
      width = TEXT
      width.value = 123

      # This will NOT work ("CASE" is treated as a literal string):
      width = CASE
      width.key.field = layout

      # Using a cObject for dynamic values — note the dummy value and .cObject syntax
      width = 1
      width.cObject = CASE
      width.cObject {
         key.field = layout
         1 = TEXT
         1.value = 400
         2 = TEXT
         2.value = 800
      }
   }
}

[coveralls]

Pull Request Test Coverage Report for Build 23288668214

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 73.307%

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Totals
Change from base Build 23060679878:	0.0%
Covered Lines:	1126
Relevant Lines:	1536

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