Update decision-making phase and enhance localization for presence tracking

- Marked tasks as complete in the decision-making phase documentation, indicating readiness for implementation.
- Updated the README to reflect the completion status of the decision-making phase.
- Enhanced localization strings to include new presence tracking features, improving user experience.
- Revised the game screen logic to display real-time presence status, including walking states for individuals.
- Added tests to validate the new localization strings and presence functionalities, ensuring robust performance.

tests/HSchool.Ai.Tests/LessonLearningTests.cs

@@ -0,0 +1,32 @@
+using HSchool.Content;
+
+namespace HSchool.Ai.Tests;
+
+public class LessonLearningTests
+{
+    private static readonly SkillDef Math = new()
+    {
+        DefName = "Mathematics",
+        Range = new IntRange { Min = 0, Max = 100 },
+    };
+
+    [Fact]
+    public void HungryLearnsLessThanFull()
+    {
+        var full = LessonLearning.Gain(50, Math, share: 1, lessonSkillPerHour: 0.05f, hours: 0.75f, hunger: 1f, traitOffset: 0);
+        var hungry = LessonLearning.Gain(50, Math, share: 1, lessonSkillPerHour: 0.05f, hours: 0.75f, hunger: 0.1f, traitOffset: 0);
+
+        Assert.True(full > 50);
+        Assert.True(hungry > 50);
+        Assert.True(full - 50 > hungry - 50);
+    }
+
+    [Fact]
+    public void DiligentOffset_RaisesTheGain()
+    {
+        var plain = LessonLearning.Gain(50, Math, 1, 0.05f, 1f, 1f, 0);
+        var diligent = LessonLearning.Gain(50, Math, 1, 0.05f, 1f, 1f, 8);
+
+        Assert.True(diligent > plain);
+    }
+}