Improves AME, Nerfs ZPinch

[Kiithnaras]

About the PR

Added a positive exponential scalar for power output for AME core counts; bigger cores produce more power for the same amount of fuel, and AMEs produce about the same amount of power per core at 2x fuel per core regardless of size.
Enlarged AME jars to hold 1600 fuel instead of 1250.
Reduced ZPinch fuel efficiency to run just under two hours (105 minutes) on roundstart fuel.
Introduced logic checks to prevent the AME controller from producing power without any cores and from registering negative-infinity power at 0 injection.

Why / Balance

Z-Pinch very too good. AME big and not as good. Made this better. Big AME very much power. Z-Pinch need refueling during round now. Seemed silly to be flying with a giant explosive power plant that might only be marginally better than a pinch reactor or two.

How to test

Fly ships with AMEs and fly others with Pinches.

Media

n/a

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.
• I can confirm this PR contains no AI-generated content, and did not use any AI-generated content.

Breaking changes

Changelog

🆑

• fix: Prevented AME controller from producing risk-free power with no cores attached
• fix: Prevented AME controller from registering negative-infinity power at zero injection
• tweak: Reduced Z-Pinch fuel efficiency
• tweak: Increased AME Jar fuel amount
• tweak: Increased AME core-based power scaling - larger AMEs produce power more efficiently at low injection rates and have about the same power efficiency at max stable fuel rate.

[Ilya246]

1 here is 200k, x is core count (max safe injection)