Add per-feature toggles to PS scripts and Go TUI
- 02-software.ps1: wrap wingetInstalls, pdfDefault, ateraAgent in Get-Feature guards
- 03-system-registry.ps1: add Get-Feature, restructure into 5 gated blocks
(systemTweaks, edgePolicies, oneDriveUninstall, powercfg, proxyDisable)
- 04-default-profile.ps1: add Get-Feature, wrap taskbarTweaks, startMenuTweaks,
explorerTweaks; add missing explorerTweaks code (ShowRecent, ShowFrequent, FullPath)
- 11-dell-update.ps1: add Get-Feature, split update run by drivers/bios feature flags
- runner.go: add Feature/StepFeatures/SelectableItem/AllSelectableItems for TUI
- config.go: add Features type and defaults for all 4 gated steps
- tui.go: use AllSelectableItems for MultiSelect, build Features map in startRun,
remove unused stepFeaturesMap variable
- xetup.exe: Windows amd64 build
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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