Activate: Add AI support for sharing product messages

[hafizrahman]

Part of #9080
ef: pe5sF9-1AH-p2)

• Compose UI for various cases
  • Default UI AI: Generate product sharing message part 1: UI #9224
  • Generating suggestions AI: Generate product sharing message part 1: UI #9224
  • Regenerate available AI: Generate product sharing message part 1: UI #9224
• Functionalities
  • Write with AI & Regenerate AI: Generate product sharing message part 2: Functionality #9236
  • Intent sharing functionality AI: Generate product sharing message part 2: Functionality #9236
• AI info screen AI: Generate product sharing message part 2: Functionality #9236
• Analytics, remove feature flag AI: Generate product sharing message part 2: Functionality #9236