Add FreeDroidWarn or equiv to inform users of Keep Android Open #363

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Please add something akin to FreeDroidWarn, if not FreeDroidWarn itself to the app so users of your app may be informed if their installation method (or even, just a popular method) is likely to be dark-patterned.

Why do you want this feature?

As you may have been made aware by https://keepandroidopen.org/ google plans on making it much harder for users to install applications through F-Droid and Obtainium.

I'm aware this app is published both there and on the Play Store.

Additional information

From the Keep Android Open Website:

all apps from non-registered developers will be blocked once their lockdown goes into effect in 2027.

The workaround for installing an app by one of these developers is a 10-step process including a >24h waiting period.