Add lifeRnd and extraLife for Weapons and more

[rylid-umil]

Adds lifeRnd and extraLife fields to weapons. They function like velocityRnd and extraVelocity but with bullet lifetimes. This is applied before scaleLife scaling. I'm unsure if this would have a use in vanilla Mindustry, but it's there, to be consistent with frag bullets, as they can do this too.

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[rylid-umil]

New features:

• width and height for particles, they are multipliers for radius and can have interp
• Color Interpolation (self explanitory), by default it is set to interp, like it usually is
• some more documentation for fields in ParticleEffect

[rylid-umil]

New feature:

• Triangle effect with customizable parameters

[rylid-umil]

i compiled with teh triangle features and stuff, it doesn't error so idk why its erroring here

bug squashed

[rylid-umil]

New feature:

• extraLife and lifeRnd for turrets, and added the missing extraVelocity field.