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/objects/landmarks.dm

@@ -22,11 +22,6 @@
 	name = "Bitrunning crate spawn"
 	icon_state = "crate"
 
-/// Where the safehouse will spawn
-/obj/effect/landmark/bitrunning/safehouse_spawn
-	name = "Bitrunning safehouse spawn"
-	icon_state = "safehouse"
-
 ///Swaps the locations of an encrypted crate in the area with another randomly selected crate.
 ///Randomizes names, so you have to inspect crates manually.
 /obj/effect/landmark/bitrunning/crate_replacer
@@ -70,3 +65,9 @@
 /obj/effect/landmark/bitrunning/mob_segment
 	name = "Bitrunning modular mob segment"
 	icon_state = "mob_segment"
+
+/// Bitrunning safehouses. Typically 7x6 rooms with a single entrance.
+/obj/modular_map_root/safehouse
+	config_file = "strings/modular_maps/safehouse.toml"
+	icon = 'icons/effects/bitrunning.dmi'
+	icon_state = "safehouse"