chore: load Swiftly signatures from the gamedata file the validator checks

[lukepolo]

• ConnectClient and SetClan patterns were hard-coded in four Swiftly source files, while the validator checked a copy in shared/gamedata/fivestack.gamedata.json that no plugin loaded
• each Swiftly plugin now ships that same file and reads its patterns from it, so what a plugin scans for is what the validator checked
• the scan itself is unchanged (Core.Memory.GetAddressBySignature); only where the pattern comes from moved
• the validator, its sets and its result JSON are untouched
• tests assert every signature a plugin asks for is in the shipped file for Linux and Windows
• not yet run on a live server