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/modules/admin/topic.dm

@@ -2257,7 +2257,7 @@
 			if(!newname)
 				return
 			G.name = newname
-			var/description = input("Enter centcom message contents:") as message|null
+			var/description = input("Enter CentCom message contents:") as message|null
 			if(!description)
 				return
 			G.report_message = description