Add JSON support to the target platform

Issue-Ref: 4048 Issue-Url: https://af3-developer.fortiss.org/issues/4048 Signed-off-by: Alexander Diewald diewald@fortiss.org

assigned to @barner

Merging already now since also needed for 4058 (MR https://git.fortiss.org/af3/af3/-/merge_requests/356, which needs some further tests / bug fixing)

mentioned in commit 9129cf35

merged