define the first version of the protocol buffers

AircraftSchedule.proto

@@ -0,0 +1,12 @@
+syntax = "proto3";
+package vatger.aman;
+
+import "Aircraft.proto";
+import "BaseTypes.proto";
+
+message AircraftSchedule {
+    Aircraft aircraft       = 1; // aircraft information
+    string   arrivalRoute   = 2; // planned arrival route
+    string   arrivalRunway  = 3; // planned arrival runway
+    Time     reachIafAtTime = 4; // UTC time when the aircraft needs to pass IAF
+}