Insert user info variables in Posts and Course Lessons

Allow community admins to personalize Posts and Course Lessons by inserting the user's info (e.g., First Name, Email, ID, etc.), the same way personalization works in emails.

Example Post:

Welcome {{user.first_name}} to Highvantage Circle! Click here to access your bonuses: https://domain.ai/access?email={{user.email}}.

User John Smith (j.s@gmail.com) would see this: Welcome John to Highvantage Circle! Click here to access your bonuses: https://domain.ai/access?email=j.s@gmail.com.

User Manoj Sharma (manoj.sharma@gmail.com) would see this: Welcome Manoj to Highvantage Circle! Click here to access your bonuses: https://domain.ai/access?email=manoj.sharma@gmail.com.