Re-design Lightning Cannon for better/pro AAA effect

[icexuick]

So the idea is to make the most awesome lightning effect. The current fast changing lines do convey lightning, but it could look much better / more realistic.

The idea is to try to achieve something like this: https://youtu.be/U8skz484Ctk?t=195 https://youtu.be/psoLXEBmfRg?t=35 or even something close to Ashes like here: https://www.youtube.com/watch?v=crPoyVGbNfQ

Current effect looks like this: https://discord.com/channels/549281623154229250/551411485901979659/1020802807181348985

• Maybe use of flipbook animated textures » though the texture dimensions should not be changed with range, which makes it look bad/fake. (But also can become ugly with 2x range modifiers)
• Maybe adding (some) arcing in current system could help making it more realistic
• Maybe making the thickness and the amount of lighting-lines customizable - might make it possible to reduce it to a single (arcing) strike/line (and some extra glow perhaps)

https://user-images.githubusercontent.com/23189106/190877055-b532d4fe-5b0e-4d8f-a0fd-486e3b75247f.mp4

[sprunk]

Copied from #161:

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Add more configurability and control to lightningcannon weapon (used by armzeus, armclaw, armthor). This is for using the texture1 property - though it might also help with no texture 1 lightning arcs

In order of importance:

1. Texture1 length should be configurable and be a fixed length globally, not based on distance of the lightning-arc.

2 Random rotation over length-axis, to give a lot more variety to the arc looks This can probably be just a one-time spawn rotation of -180 r 360, but if possible, having it rotate over time could possibly be extra awesome. This weapon fires in burst, so it should apply random rotation for each separate shot in burstfire. 2B. Optionally also (on/off-able) random flipping/mirroring of texture1 in length, for even more variety/realistic looks

3. Get control over amount of 'iterations' of the lightning 'forks' (how many, and how far they can bend outwards)

concept of what to achieve

instead of: