Adds a modular bitrunning map, changes safehouse spawns (#79937)

## About The Pull Request
Primarily, this adds one new map to bitrunning that uses modular rooms.

<details>
<summary>pictures</summary>


![image](https://github.com/tgstation/tgstation/assets/42397676/48d78e05-1134-477c-a269-a4b71064058b)

![Screenshot 2023-11-25
133937](https://github.com/tgstation/tgstation/assets/42397676/851d6235-e939-465c-92e5-830886d50d9c)


![image](https://github.com/tgstation/tgstation/assets/42397676/6094dae6-fc3b-4cc4-9fd5-d7dd6d944cee)

</details>

I also added in some changes:
- Safehouses are now loaded using the modular map system rather than the
bespoke solution qservers had.
- Lowers the difficulty of psyker shuffle (which I felt was a little too
nightmarish) and boosts its rewards.
## Why It's Good For The Game
New maps
More integration with prior systems
## Changelog
🆑
add: Added a new modular bitrunning domain - Starfront Saloon.
balance: Psyker shuffle domain was made slightly easier and has been
given more rewards.
/🆑

code/modules/bitrunning/virtual_domain/virtual_domain.dm

@@ -9,8 +9,6 @@
 
 	/// Cost of this map to load
 	var/cost = BITRUNNER_COST_NONE
-	/// The safehouse to load into the map
-	var/datum/map_template/safehouse/safehouse_path = /datum/map_template/safehouse/den
 	/// Any outfit that you wish to force on avatars. Overrides preferences
 	var/datum/outfit/forced_outfit
 	/// The description of the map for the console UI