chore: add staging env file

Author: Zeff01

apps/codebility/.env.staging

@@ -0,0 +1,40 @@
+# ======================
+# App Metadata
+# ======================
+NEXT_PUBLIC_SITE_TITLE="Codebility"
+NEXT_PUBLIC_DEFAULT_LOCALE=en
+NEXT_PUBLIC_DEFAULT_THEME_MODE=system
+NEXT_PUBLIC_THEME_COLOR=purple
+NEXT_PUBLIC_THEME_COLOR_DARK=black
+
+# ======================
+# Application URLs
+# ======================
+NEXT_PUBLIC_APP_BASE_URL=http://localhost:3000
+NEXT_PUBLIC_MESSENGER_WAITLIST=https://m.me/ch/AbZetDK-QhFBYxk6/?send_source=cm%3Acopy_invite_link
+NEXT_PUBLIC_DISCORD_LINK=https://discord.gg/HN8XtB4E55
+
+# ======================
+# Supabase Credentials
+# ======================
+NEXT_PUBLIC_SUPABASE_URL=https://hibnlysaokybrsufrdwp.supabase.co
+NEXT_PUBLIC_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6ImhpYm5seXNhb2t5YnJzdWZyZHdwIiwicm9sZSI6ImFub24iLCJpYXQiOjE3Mzc0NjM1NjUsImV4cCI6MjA1MzAzOTU2NX0.7_QnkBcgefEzVcqrC5vFi4yVqbVpdW5qyWSF8QSiL2o
+DB_SERVICE_ROLE=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6ImhpYm5seXNhb2t5YnJzdWZyZHdwIiwicm9sZSI6InNlcnZpY2Vfcm9sZSIsImlhdCI6MTczNzQ2MzU2NSwiZXhwIjoyMDUzMDM5NTY1fQ.f6C5KYptI8gwYHuPS2gngemiBT3sQRcBGWCRNqqFq7w
+
+# ======================
+# Redis Configuration
+# ======================
+REDIS_URL=redis-19178.crce178.ap-east-1-1.ec2.redns.redis-cloud.com:19178
+REDIS_PASSWORD=eeb6GBWDLT7ubwvb8zQc2dW365AT2hHJ
+
+# ======================
+# Email Configuration
+# ======================
+EMAIL_USER=itpahilgadev@gmail.com
+EMAIL_APP_PASSWORD=ypfdqnbruuowokfg
+NEXT_PUBLIC_RESEND_API_KEY=re_uPimMdw4_6BGKXxxCfXyA5cu5hCAUMC9x
+
+# ======================
+# Application Identifiers
+# ======================
+NEXT_PUBLIC_FOUNDER_USER_ID=5d1a6fea-6fa4-4766-a2a0-e58d0f2a34b0