Fix CLI startup errors from invalid Spectre.Console command configuration

[perkops]

The CLI tool (atc-kepware-configuration) fails to start due to three Spectre.Console command configuration errors introduced when adding driver-specific commands. This PR fixes all three issues so the CLI can launch and display help correctly.

🐛 Fixes

• Fix tag create commands added to parent node instead of the create branch, causing "branch defines no commands" error
• Rename --k and --w to --k-factor and --w-factor on IEC 60870-5-104 channel settings — Spectre.Console requires long options to be more than one character
• Rename device-level --username to --device-username on Yokogawa CX/DX/GX/MW Ethernet and SNMP device settings to avoid conflict with the base Kepware server --username option

🎨 Styling

• Reformat AddCommand call chains in CommandAppExtensions for consistency