Grammar fixes to atom descriptions (#31293)

* Grammar fixes to atom descriptions

- Capitalization and punctuation on most descriptions
- CentCom instead of centcom where appropriate
- Earth instead of earth where appropriate

* Remove spaces before newlines and oneline some strings

code/game/objects/items/implants/implant_exile.dm

@@ -3,7 +3,7 @@
 
 /obj/item/implant/exile
 	name = "exile implant"
-	desc = "Prevents you from returning from away missions"
+	desc = "Prevents you from returning from away missions."
 	origin_tech = "materials=2;biotech=3;magnets=2;bluespace=3"
 	activated = 0
 

code/game/objects/items/implants/implant_misc.dm

@@ -1,6 +1,6 @@
 /obj/item/implant/weapons_auth
 	name = "firearms authentication implant"
-	desc = "Lets you shoot your guns"
+	desc = "Lets you shoot your guns."
 	icon_state = "auth"
 	origin_tech = "magnets=2;programming=7;biotech=5;syndicate=5"
 	activated = 0

code/game/objects/items/implants/implantchair.dm

@@ -151,7 +151,7 @@
 
 /obj/machinery/implantchair/genepurge
 	name = "Genetic purifier"
-	desc = "Used to purge human genome of foreign influences"
+	desc = "Used to purge a human genome of foreign influences."
 	special = TRUE
 	special_name = "Purge genome"
 	injection_cooldown = 0