Some signs I need for mapping pls merge (#10671)

Resources/Prototypes/Entities/Structures/Wallmounts/Signs/metamap.yml

@@ -0,0 +1,9 @@
+- type: entity
+  parent: PosterBase
+  id: PosterMapMetaRight
+  name: "Meta Station Map"
+  description: "A map of Meta Station. This looks really old."
+  components:
+  - type: Sprite
+    state: metamap64x
+    sprite: Structures/Wallmounts/metamap.rsi

Resources/Prototypes/Entities/Structures/Wallmounts/Signs/signs.yml

@@ -1094,3 +1094,75 @@
   components:
   - type: Sprite
     state: something-old2
+
+- type: entity
+  parent: BaseSign
+  id: SignSecurity
+  name: security sign
+  description: A sign depicting the security insignia.
+  components:
+  - type: Sprite
+    state: security
+
+- type: entity
+  parent: BaseSign
+  id: SignPlaque
+  name: golden plaque
+  description: A prestigious golden plaque.
+  components:
+  - type: Sprite
+    state: goldenplaque
+
+- type: entity
+  parent: BaseSign
+  id: SignKiddiePlaque
+  name: kiddie plaque
+  description: A modest plaque.
+  components:
+  - type: Sprite
+    state: kiddieplaque
+
+- type: entity
+  parent: BaseSign
+  id: SignNanotrasen1
+  name: nanotrasen sign 1
+  description: Part 1.
+  components:
+  - type: Sprite
+    state: nanotrasen_sign1
+
+- type: entity
+  parent: BaseSign
+  id: SignNanotrasen2
+  name: nanotrasen sign 2
+  description: Part 2.
+  components:
+  - type: Sprite
+    state: nanotrasen_sign2
+
+- type: entity
+  parent: BaseSign
+  id: SignNanotrasen3
+  name: nanotrasen sign 3
+  description: Part 3.
+  components:
+  - type: Sprite
+    state: nanotrasen_sign3
+
+- type: entity
+  parent: BaseSign
+  id: SignNanotrasen4
+  name: nanotrasen sign 4
+  description: Part 4.
+  components:
+  - type: Sprite
+    state: nanotrasen_sign4
+
+- type: entity
+  parent: BaseSign
+  id: SignNanotrasen5
+  name: nanotrasen sign 5
+  description: Part 5.
+  components:
+  - type: Sprite
+    state: nanotrasen_sign5