Setting up basic API Structure

ac_web/lib/Api/Dtos/EAgentStatus.dart

@@ -0,0 +1,27 @@
+/// Mirror of the backend `EAgentStatus` enum.
+///
+/// See the note in `EAgentType.dart` about ordering and [unknown].
+enum EAgentStatus {
+  offline,
+  idle,
+  working,
+  error,
+  unknown;
+
+  bool get isOnline => this == EAgentStatus.idle || this == EAgentStatus.working;
+
+  String get displayName {
+    switch (this) {
+      case EAgentStatus.offline:
+        return 'Offline';
+      case EAgentStatus.idle:
+        return 'Idle';
+      case EAgentStatus.working:
+        return 'Working';
+      case EAgentStatus.error:
+        return 'Error';
+      case EAgentStatus.unknown:
+        return 'Unknown';
+    }
+  }
+}