Natural Trijent Dam Tunnels (#4458)

# About the pull request

Adds 9 naturally spawning tunnels to Trijent Dam.

# Explain why it's good for the game

Trijent Dam is a map which has a complete lack of naturally spawning
tunnels unlike practically every other map, this is addition makes it
fall in line with all of the other maps having naturally spawning
tunnels and makes it less of a chore to set up a proper tunnel system
during normal gameplay.

# Testing Photographs and Procedure

Ran it locally, maps are in intended places and function as a normal
tunnel would.


![image](https://github.com/cmss13-devs/cmss13/assets/31109792/a0a5d938-9269-4fbf-a842-d2574ac19002)

The tunnel locations.

![Trijent Tunnel Map V2
1](https://github.com/cmss13-devs/cmss13/assets/31109792/3eb9fbf2-09fd-4c3b-949e-7d52f93b60b5)

# Changelog

:cl:
mapadd: added 9 new tunnels to trijent dam
/:cl:

maps/map_files/DesertDam/Desert_Dam.dmm

@@ -712,6 +712,7 @@
 /turf/open/desert/dirt,
 /area/desert_dam/exterior/valley/valley_labs)
 "acq" = (
+/obj/structure/tunnel,
 /turf/open/desert/dirt{
 	icon_state = "rock1"
 	},
@@ -61278,6 +61279,10 @@
 	icon_state = "cement_sunbleached13"
 	},
 /area/desert_dam/exterior/valley/valley_hydro)
+"hyH" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt,
+/area/desert_dam/exterior/valley/valley_telecoms)
 "hzg" = (
 /obj/effect/decal/sand_overlay/sand2,
 /obj/effect/landmark/structure_spawner/xvx_hive/xeno_wall,
@@ -61854,6 +61859,12 @@
 	icon_state = "delivery"
 	},
 /area/desert_dam/exterior/telecomm/lz1_south)
+"jxN" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt{
+	icon_state = "desert_transition_edge1"
+	},
+/area/desert_dam/exterior/valley/valley_crashsite)
 "jAr" = (
 /obj/structure/closet/crate/hydroponics/prespawned,
 /obj/effect/landmark/objective_landmark/close,
@@ -62155,6 +62166,12 @@
 /obj/structure/blocker/forcefield/multitile_vehicles,
 /turf/open/desert/dirt,
 /area/desert_dam/interior/caves/central_caves)
+"kQd" = (
+/obj/structure/tunnel,
+/turf/open/desert/rock/deep{
+	icon_state = "rock3"
+	},
+/area/desert_dam/interior/caves/east_caves)
 "kRX" = (
 /obj/structure/surface/table,
 /obj/item/storage/fancy/vials/random,
@@ -63992,6 +64009,12 @@
 	icon_state = "cement_sunbleached18"
 	},
 /area/desert_dam/exterior/valley/south_valley_dam)
+"ruJ" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt{
+	icon_state = "rock1"
+	},
+/area/desert_dam/exterior/valley/valley_medical)
 "ruS" = (
 /turf/open/desert/dirt,
 /area/desert_dam/exterior/telecomm/lz1_valley)
@@ -64092,6 +64115,12 @@
 "rHw" = (
 /turf/open/floor/plating,
 /area/desert_dam/exterior/telecomm/lz2_containers)
+"rIY" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt{
+	icon_state = "rock1"
+	},
+/area/desert_dam/exterior/valley/valley_hydro)
 "rJA" = (
 /obj/structure/lz_sign/dam_sign,
 /turf/open/desert/dirt{
@@ -65131,6 +65160,13 @@
 /obj/effect/decal/cleanable/dirt,
 /turf/open/asphalt,
 /area/desert_dam/exterior/valley/valley_hydro)
+"vph" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt{
+	dir = 4;
+	icon_state = "desert_transition_edge1"
+	},
+/area/desert_dam/exterior/valley/south_valley_dam)
 "vpn" = (
 /obj/structure/machinery/landinglight/ds2/delayone{
 	dir = 8
@@ -65272,6 +65308,12 @@
 /obj/effect/decal/cleanable/dirt,
 /turf/open/asphalt,
 /area/desert_dam/exterior/valley/valley_hydro)
+"vHx" = (
+/obj/structure/tunnel,
+/turf/open/desert/dirt{
+	icon_state = "rock1"
+	},
+/area/desert_dam/exterior/valley/valley_civilian)
 "vHQ" = (
 /turf/open/gm/empty,
 /area/shuttle/trijent_shuttle/omega)
@@ -65678,6 +65720,11 @@
 /obj/structure/flora/grass/desert/lightgrass_5,
 /turf/open/desert/dirt,
 /area/desert_dam/exterior/valley/valley_hydro)
+"xec" = (
+/obj/structure/flora/grass/desert/lightgrass_1,
+/obj/structure/tunnel,
+/turf/open/desert/dirt,
+/area/desert_dam/exterior/valley/valley_civilian)
 "xgA" = (
 /obj/structure/flora/grass/tallgrass/desert/corner{
 	dir = 5
@@ -69526,7 +69573,7 @@ ceA
 aSI
 chG
 ceA
-ceA
+hyH
 acs
 aWc
 aWF
@@ -88683,7 +88730,7 @@ bLr
 dTs
 dTs
 nmr
-iwh
+vph
 pvs
 dTs
 dTs
@@ -94137,7 +94184,7 @@ dTs
 dTs
 dTs
 dTs
-dNp
+rIY
 cMl
 dNS
 dNS
@@ -104714,7 +104761,7 @@ dTs
 dTs
 dTs
 dTs
-cuw
+vHx
 cwo
 cux
 cmH
@@ -108079,7 +108126,7 @@ dTs
 dTs
 dTs
 dTs
-agD
+jxN
 adA
 aEZ
 aFi
@@ -110720,7 +110767,7 @@ civ
 cdA
 cdw
 aOG
-cgc
+ruJ
 dTs
 dTs
 dTs
@@ -119446,7 +119493,7 @@ clZ
 crW
 cWV
 xOb
-cpa
+xec
 aVd
 bby
 bvw
@@ -120211,7 +120258,7 @@ dTs
 dTs
 dTs
 acY
-acY
+kQd
 dTs
 dTs
 dTs