feat: dual-workspace UI with parameterized module execution

[hseblani]

Summary

• redesign main window layout to remove overlap and support responsive split panes
• add two workspaces in one app: IT Swiss-Army Knife and Module Manager
• add dynamic parameter editor from module manifest fields
• add module execution timeout, cancellation handling, and output streaming
• add per-run log persistence under LocalAppData
• add core module catalog and execution runner services with tests

Validation

• dotnet build ITSwissArmyKnife.App.sln --configuration Release
• dotnet test ITSwissArmyKnife.App.sln --configuration Release --no-build

Notes

• recommendation is one executable with two workspaces, not two separate apps