Objectives ecs rework (#19967)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Objectives/ObjectiveInfo.cs

@@ -0,0 +1,17 @@
+using Robust.Shared.Serialization;
+using Robust.Shared.Utility;
+
+namespace Content.Shared.Objectives;
+
+/// <summary>
+/// Info about objectives visible in the character menu and on round end.
+/// Description and icon are displayed only in the character menu.
+/// Progress is a percentage from 0.0 to 1.0.
+/// </summary>
+/// <remarks>
+/// All of these fields must eventually be set by condition event handlers.
+/// Everything but progress can be set to static data in yaml on the entity and <see cref="ObjectiveComponent"/>.
+/// If anything is null it will be logged and return null.
+/// </remarks>
+[Serializable, NetSerializable]
+public record struct ObjectiveInfo(string Title, string Description, SpriteSpecifier Icon, float Progress);