* Add optional xpadneo driver prompt to Steam installer
Prompts users during Steam installation to optionally install the xpadneo driver, which fixes common Xbox/Bluetooth controller issues including detection problems and missing rumble support.
* Install xpadneo controller driver by default
* Add idempotency checks and relaunch state
* Remove Steam launch since relaunch required
* Extract xbox controller installer into separate step
* Bring back launch
* Force reinstall
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Co-authored-by: David Heinemeier Hansson <david@hey.com>
