QR code field type

1Password already generates QR codes for Wi-Fi items, which is genuinely useful. I'd like to propose extending that concept to a general-purpose QR code field that stores an arbitrary text string and renders it as a scannable QR code on display.

Others have raised related ideas here:

- Storing Smart Home QR codes in 1Password (https://www.1password.community/discussions/1password/storing-smart-home-codes/163633)

- Generating QR URLs (https://www.1password.community/discussions/1password/suggestion-wi-fiurl-qr-code-generator/133510)

My specific use case is that I recently purchased a set of IKEA Matter smart bulbs. Each bulb ships with a unique QR code required for Matter commissioning, the process that pairs the device with Apple Home, Google Home, or any other Matter controller. That QR code encodes a device-specific payload string (e.g. `MT:Y.K9042C00KA0648G00`) containing the setup PIN, discriminator, vendor ID, and product ID for that individual unit.

This code is critical to preserve. If a bulb is factory reset, whether intentionally or after a power event, it cannot be re-commissioned without it.

I already have the raw payload string, and storing it as a plain text field works in a pinch. But the real-world workflow for re-commissioning requires scanning a QR code, not typing a string. A QR code field would close that gap. Store the payload string once and get a scannable QR whenever you need it, exactly as 1Password does today for Wi-Fi passwords.

The field itself would be simple. A text input that renders a QR code on view, with no special encoding logic needed beyond what already exists for Wi-Fi items.