chore(deps): add autoware_internal_msgs (#113)

Signed-off-by: Yamato Ando <yamato.ando@tier4.jp>

Author: YamatoAndo

build_depends.repos

@@ -15,6 +15,10 @@ repositories:
     type: git
     url: https://github.com/autowarefoundation/autoware_adapi_msgs.git
     version: main
+  msg/autoware_internal_msgs:
+    type: git
+    url: https://github.com/autowarefoundation/autoware_internal_msgs.git
+    version: main
   universe/tier4_autoware_msgs:
     type: git
     url: https://github.com/tier4/tier4_autoware_msgs.git