Gives the tcomms substations starting power (#6089)

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## About The Pull Request

Give the tcomms substations with power in them to start, as well as
breakers that start deactivated. This means that the comms will run for
about 1 hour even if nobody starts power immediately. While I did adjust
the Tether tcomms, this PR was not actually tested there since it isn't
a server we currently run, I just didn't want to leave it behind on this
particular change. The power usage (and therefore expected uptime) there
should be similar.

## Why It's Good For The Game

People shouldn't be rendered unable to communicate over radio within 5
minutes of roundstart because engineers aren't around or aren't capable
of immediately generating power. This gives the facility about an hour
of leeway before the comms die, making it still important to get main
power running but not something that's going to immediately negatively
impact everyone.

## Changelog

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:cl: SingingSpock
tweak: Tcomms substations start with a bit of power in them, so they
won't die immediately on roundstart
/:cl:

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code/modules/power/smes/smes.dm

@@ -556,6 +556,14 @@ GLOBAL_LIST_EMPTY(smeses)
 	input_level = 100
 	output_level = 200
 
+/obj/machinery/power/smes/buildable/tcomms
+	name = "telecomms smes"
+	desc = "A high-capacity superconducting magnetic energy storage (SMES) unit. This is the one dedicated to telecommunications."
+	charge = KWH_TO_KWM(SMES_COIL_STORAGE_BASIC * 1 * 0.25)
+	input_level = 100
+	output_level = 200
+	RCon_tag = "Telecomms"
+
 #define SMES_UI_INPUT 1
 #define SMES_UI_OUTPUT 2