More Barsigns, Service Holosign (#20963)

After a brief discourse in Discord #general channel it was decided to
add some more barsigns and a new one (I had sitting around for 500 years
on my PC). Three new barsigns were added:

![image](https://github.com/user-attachments/assets/d8a4f87d-5cf2-458a-b584-a397a985db2a)

With the following descriptions:

![image](https://github.com/user-attachments/assets/4c1d5893-2504-4174-8066-d593259a1e2c)


The new holosign looks like this:

![image](https://github.com/user-attachments/assets/2f3ecd5d-5dc7-4768-8c08-500a4388d6ea)

Has a nice little animation. Signs and buttons are mapped into bar and
kitchen. Some really minor shuffling was done for the signs. Tested
locally and it works on my machine (💯).

Please enjoy.
### Asset Licenses
The following assets that **have not** been created by myself are
included in this PR:

| Path | Original Author | License |
| --- | --- | --- |
| barsigns.dmi| Unknown (BayStation12) | AGPL v3.0 |

---------

Signed-off-by: KingOfThePing <43940569+KingOfThePing@users.noreply.github.com>
Co-authored-by: SleepyGemmy <99297919+SleepyGemmy@users.noreply.github.com>

code/game/objects/structures/barsign.dm

@@ -145,6 +145,20 @@
 	icon_state = "Commie"
 	desc = "The name of a bar, located at Pluto's biggest spaceport."
 	desc_extended = "People's Preferred is the name of the drinking hole at Pluto's biggest spaceport. Everyone stops there and everyone loves it there. It's what the people prefer, apparently."
+/singleton/sign/double/bar/we_are_open
+	name = "We Are Open!"
+	icon_state = "We Are Open!"
+	desc = "The bar's sign flashing 'We Are Open!' indicating that it is indeed open for business."
+	desc_extended = "Sometimes it doesn't need a fancy sign, slogan, or flashy colours to draw in people to the bar. The service and booze usually does. This sign here simply lets crew know that they are getting both here, right now."
+/singleton/sign/double/bar/closed
+	name = "Closed"
+	icon_state = "Closed"
+	desc = "The sign flashes 'CLOSED'. A real tragedy for crew far and wide."
+/singleton/sign/double/bar/free_drinks
+	name = "Free Drinks!"
+	icon_state = "Free Drinks!"
+	desc = "Either the XO or the Captain were in a really good mood, someone's pranking the crew, or it is your lucky day. Cheers!"
+
 /singleton/sign/double/kitchen/event_horizon // Start of the kitchen signs. Don't mix it up.
 	name = "Event Horizon"
 	icon_state = "Event Horizon"