Fish update just dropped. New fish, aquarium type, two traits and a research node. (#83508)

## About The Pull Request

### New fish

#### anxious zipzap
An incredibly anxiety-ridden and electroreceptive fish. Worried about
the walls of its tank closing in constantly. Both literally and as a
general metaphorical unease about life's direction.

It produces electricity, and HATES being with any other fish. One other
zipzap is allowed at most.


![image](https://github.com/tgstation/tgstation/assets/40974010/6a1a31f3-1c84-4b5e-b8ca-652c5007813a)

#### monocloning jumpercable
A surprisingly useful if nasty looking creation from the syndicate fish
labs. Drop one in a tank, and watch it self-feed and multiply. Generates
more and more power as a growing swarm!

A far better option for power generation than the zipzap, but it's a
syndicate fish. Get an emag or get very lucky!


![image](https://github.com/tgstation/tgstation/assets/40974010/7f4aaf32-919c-40d9-890f-72ea9f91ac3c)

Working spacebase example


![image](https://github.com/tgstation/tgstation/assets/40974010/8eeaaf18-c0ab-48a5-8ada-e0eb7f118dd9)


### Aquarium type

Bioelectricity Generator! It boosts the power of electroreceptive fish
to very dangerous levels! But, uh, you put a tesla coil, and voila! Free
power! ...Free power if you keep the fish fed! More fish, more power!


![image](https://github.com/tgstation/tgstation/assets/40974010/e6abcd5b-93df-4ffc-ac6a-78585fd4a6c6)

You can convert an aquarium into a bioelectricity generator by
researching the new node, "Marine Utility", from bio processing. Then
you build the biogen upgrade kit and apply it to an already existing
aquarium.

### Fish Traits

#### Electrogenesis

Trait turns the fish into a shock weapon while it's alive, and every
time it feeds, it releases a weak tesla bolt to anyone close to the
tank.

#### Anxiety

anxious fish die when any other fish are in the tank. Please keep them
alone :[

## Why It's Good For The Game

Fish are great, but fish don't have anything to give back to the
station, right? Well, there's some small stuff, but I wanted to add a
bit of functionality towards being able to benefit from having fish.

The anxiety trait with the zipzap gives spessmen a bit of a challenge.
You can settle for one fish generating power per tank and do a
multi-tank generation setup, or you can do some crossbreeding to make a
fish WITH electroreceptive but WITHOUT anxiety. Neat!

## Changelog
🆑
add: New fish, the anxious zipzap
add: New syndicate fish, the monocloning jumpercable
add: New aquarium, the bioelectricity generator
fix: Mixotrophic fish now properly lack food requirements
/🆑

code/modules/research/techweb/all_nodes.dm

@@ -508,6 +508,18 @@
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 4000)
 	discount_experiments = list(/datum/experiment/scanning/random/cytology = 3000) //Big discount to reinforce doing it.
 
+/datum/techweb_node/marine_util
+	id = "marine_util"
+	display_name = "Marine Utility"
+	description = "Fish are nice to look at and all, but they can be put to use."
+	prereq_ids = list("bio_process")
+	design_ids = list(
+		"bioelec_gen",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 4000)
+	// only available if you've done the first fishing experiment (thus unlocking fishing tech), but not a strict requirement to get the tech
+	discount_experiments = list(/datum/experiment/scanning/fish/second = 3000)
+
 /////////////////////////Advanced Surgery/////////////////////////
 
 /datum/techweb_node/imp_wt_surgery