Update SIGNALduino_TOOL for refactored RFFHEM protocol libs

[sidey79]

Closes #153

Summary

• switch SIGNALduino_TOOL from lib::SD_Protocols to FHEM::Devices::SIGNALduino::SD_Protocols
• load protocol data from lib/FHEM/Devices/SIGNALduino/SD_Protocols/Data.pm
• update embedded META prerequisites to the new package name
• add a devcontainer setup for validating against a neighboring RFFHEM checkout
• add a smoke test that verifies the /opt/fhem overlay uses the workspace module and RFFHEM protocol libraries

Validation

• prove -lv t/load_protocol_package.t t/json_check.pl inside the devcontainer after . /entry.sh && initialContainerSetup and ./.devcontainer/link_workspace.sh

Commits

• 048a9a0 Add devcontainer for RFFHEM-based validation
• d8a3cee Update SIGNALduino_TOOL to new RFFHEM protocol package

[sidey79]

Ich habe noch ein paar "for compatibility , getProperty" Einträge entfernt. Ich nehme an, das brauchen wir nicht mehr.