Content update on the public beta branch!

I have moved the content update to the public beta branch! I took a little while longer testing it than anticipated as it edits some save files to accommodate the 2 new items and unlocks, and I don't want to ever force a restart if possible.

New additions:

• 2 new support items! These need to be unlocked by engaging with the new map content.

• New map type: Pilgrims gate. Highly defended regions that show up later in runs.

• 3 New POIs, two unique to the Pilgrims gate, another that is always/multiples common in asteroid belts, occasionally elsewhere.

• 2 new cargo ships, both appearing mid-late in runs. A third cargo exclusive to the Pilgrims gate.

• Cargo ships now can have escorts.

• Minor loot Poi that drops health and a small cache of coins that can appear in place of empty POI slots.

Minor additions/changes:

• Ship HP and Speed added to the ship select screen, as these vary by ship

• Audio fix for alien cargo plasma castor, missed in the audio fixing update.