Add new 7 RevenueCat SDK skills

[skydoves]

Motivation

Brings the code-side RevenueCat SDK skills (previously developed in the RevenueCat/revenuecat-skills repo) into this single-source-of-truth toolkit so users only need one plugin/marketplace entry to get the full set of RevenueCat skills.

The existing skills in this repo are MCP-driven and focus on the dashboard side (creating projects, apps, products, entitlements, reading charts, troubleshooting via MCP). The new skills cover the code side of RevenueCat installing the SDK, wiring up Purchases.configure(...), displaying paywalls, gating features, debugging from logs, etc. across iOS, Android, Kotlin Multiplatform, Flutter, and React Native.

Description

Adds 7 new skills under revenuecat/skills/, all renamed from the source rc-* convention to the repo's revenuecat-* convention:

New skill	Purpose
revenuecat-paywall	Display a dashboard-templated paywall via RevenueCatUI
revenuecat-customer-center	Add the self-service Customer Center UI
revenuecat-entitlements-gate	Check / react to active entitlements to gate features
revenuecat-identify-user	Wire logIn / logOut to the app's auth system
revenuecat-purchase-flow	Implement purchase + restore manually
revenuecat-testing-setup	Set up sandbox / Test Store / StoreKit-config testing channels
revenuecat-migrate	Migrate from raw StoreKit / Play Billing or upgrade SDK majors

[jefago]

I think this works, I am just curious why you chose the SKILL.md pointing at README.md setup instead of putting the instructions directly into SKILL.md? Seems like just one thing that could go wrong if the agent somehow doesn't follow that instruction properly...

[skydoves]

Good catch! That is actually a legacy structure from the original repo. I just refactored, and every skill is now a single self-contained SKILL.md. Thank you for your review!