APP-7128 support agent on windows

[abe-winter]

What changed

• installer support
  • old agent.bat (can ditch this at some point)
  • YML workflow to build msi
  • .wxs file for MSI
• utils
  • config.go: add two Disabled() getters to always disable some subsystems on windows (regardless of config)
  • utils.go: path setup, factor our checkPathOwner, auto-add .exe extension, fix some file handling errors, do netsh
  • make Kill and SyncFS platform-dependent
  • add KillTree
• main.go
  • factor out big chunks that don't work on win yet: runPlatformProvisioning, waitOnline
  • add main_windows.go which manages a windows service

Why

Support agent on windows

Manual testing

• on windows:
  • test start / stop (including RDK module processes)
  • test upgrading RDK + agent
• test to make sure linux hasn't been broken

[ale7714]

Code change makes sense to me. After you merge, i'd like to test latest on linux to make sure is all 👍

[Otterverse]

Mostly minor stuff, and a few questions. I'm not up to speed on windows here, so apologies for any dumb callouts/questions there.

[Otterverse]

Changes since last review all look fine (no NEW issues) and I trust you on the ticket-vs-resolve-now stuff. Good to merge here, but let's do some testing on the dev version that gets built from this before actually releasing as stable.

[atlassian]

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