Summary: Steer adds "Download for free" options

Why It Matters: This change makes it easier for new users to try Steer. It removes a barrier to entry.

What Changed:

• The number "55,765" for messages rewritten was removed.
• The "Download" button was changed to "Download for free" in some places.
• A new "Send download link" option was added.
• Some content was duplicated, like headings and feature descriptions.