[~TASK][!!!] FLOW3 (Configuration): Merged the FLOW3 settings into the generic Settings.yaml file, dropping support for the FLOW3.yaml files. This means that you need to move all your custom settings from your own FLOW3.yaml files to Settings.yaml. Note that in FLOW3.yaml files no "FLOW3:" key on the first level was necessary which now becomes mandatory in the Settings.yaml file. Resolves #5579
[~FEATURE] FLOW3 (Configuration): The configuration cache (usually only used in Production context) is now cleared automatically if the FLOW3 Bootstrap revision changes.
[~TASK] FLOW3 (Documentation): Updated the examples referring to FLOW3.yaml.