Feature: Conversation Playtest Simulator

[CWolfs]

Add a lightweight playtest/simulation mode for conversations.

This should help mod makers understand which responses will appear without needing to repeatedly launch BattleTech.

For this change:

• Allow the user to walk through the active conversation from its roots
• Show the prompt text and available responses in a simple playtest view
• Allow mock values for common condition inputs:
  • Current date
  • Company funds
  • Company, commander, system, and flashpoint stats
  • Tags
  • Current system
  • DLC/career mode flags where supported by definitions
• Evaluate known ConverseTek/ExtendedConversations conditions against the mock state where possible
• Show unavailable responses with the reason they failed when possible
• Clearly mark actions as simulated rather than actually executed
• Do not change the saved conversation data from the simulator