Add Stealth App

[AlsoAHuman]

Stealth is a FOSS reddit client for android
here is the HTML of the app:
https://f-droid.org/packages/com.cosmos.unreddit

here is the app config as HTML:
https://apps.obtainium.imranr.dev/redirect?r=obtainium://app/%7B%22id%22%3A%22com.cosmos.unreddit%22%2C%22url%22%3A%22https%3A%2F%2Ff-droid.org%2Fpackages%2Fcom.cosmos.unreddit%22%2C%22author%22%3A%22CosmosApps%22%2C%22name%22%3A%22Stealth%22%2C%22preferredApkIndex%22%3A0%2C%22additionalSettings%22%3A%22%7B%5C%22filterVersionsByRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22trySelectingSuggestedVersionCode%5C%22%3Afalse%2C%5C%22autoSelectHighestVersionCode%5C%22%3Afalse%2C%5C%22trackOnly%5C%22%3Afalse%2C%5C%22versionExtractionRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22matchGroupToUse%5C%22%3A%5C%22%5C%22%2C%5C%22versionDetection%5C%22%3Atrue%2C%5C%22useVersionCodeAsOSVersion%5C%22%3Afalse%2C%5C%22apkFilterRegEx%5C%22%3A%5C%22%5C%22%2C%5C%22invertAPKFilter%5C%22%3Afalse%2C%5C%22autoApkFilterByArch%5C%22%3Atrue%2C%5C%22appName%5C%22%3A%5C%22%5C%22%2C%5C%22shizukuPretendToBeGooglePlay%5C%22%3Afalse%2C%5C%22exemptFromBackgroundUpdates%5C%22%3Afalse%2C%5C%22skipUpdateNotifications%5C%22%3Afalse%2C%5C%22about%5C%22%3A%5C%22%5C%22%7D%22%2C%22overrideSource%22%3Anull%7D

[DwainZwerg]

Hello @AlsoAHuman,
see #84 (comment). Both Hamster45105 and I will not clutter the site with apps that are easy to add. If you have a different opinion, feel free to add the app yourself via PR. Hamster45105 has also created a simple Python script that will do all the work for you.