Add navy orders, fixes to Soviet 06a

[JovialFeline]

Follow-up to #21243 that adds events from the RA '96 mission, reorganizes some parts of the script, etc.

A summary of those changes:

• Cruisers blow up a bridge segment shortly after the start. This is skipped on Easy.
• A Cruiser responds if some Allied structures are attacked before the Radar Dome objective is done. This is skipped on Easy.
• The Radar Dome's capture now stops Allied reinforcements as expected. This is also immediate, not after the next wave's arrival.
• The Allies' rebuild logic:
  • The rebuild area is checked for blockers. If there's a blocker, another attempt is scheduled. Friendly blockers can be scattered.
  • Structures can be rebuilt if they are captured and sold.
  • The War Factory and Barracks will try to restart production when rebuilt.
  • The structures to be rebuilt and the information for rebuilding them are now in one table, in the AI script.
• Idle pre-placed units will hunt if they are attacked.
• The facings of pre-placed units is corrected.

This PR differs from that in some small ways:

• Defenses by the south entrance to the Allied base are rebuildable.
• Since Greece owns a Naval Yard on this map, they'll produce a Destroyer patrol on Hard.
• The response Cruiser sets up in a more defensive spot by the Naval Yard; there's no waterway close to the Soviet base.
  • The original "rspd" trigger and teamtype seem set up like the B map, but that team is not called upon.
  • Another trigger also ordered all of Greece to hunt if this Cruiser died, but I've omitted this.