## Bug description

I was super confused why I can't add text cards to a dashboard locally… turns out that's a paid feature, which is not communicated in the product, and I happened not to have a license. This is suboptimal in two cases:
1. User is not aware we've built text cards – it's very unlikely they'll learn about this feature
2. User is aware we've built text cards, but for some reason doesn't currently have a subscription – they'll be confused why the feature's suddenly gone with the wind (like me)

#### *Thank you* for your bug report – we love squashing them!

posthog/settings/feature_flags.py
import os
from posthog.settings.utils import get_list
PERSISTED_FEATURE_FLAGS = get_list(os.getenv("PERSISTED_FEATURE_FLAGS", "")) + [
    "simplify-actions",
    "historical-exports-v2",
    "text-cards",
    "event-count-per-actor",
    "ingestion-warnings-enabled",
]