refactor: properly rename connections-related tables; top-level namespaces

Database/Entities/ConnectionsCategory.cs

@@ -0,0 +1,34 @@
+namespace ConnectionsAPI.Database.Entities;
+
+public class ConnectionsCategory
+{
+    /// <summary>
+    /// Primary key of the entity
+    /// </summary>
+    public int Id { get; set; }
+
+    /// <summary>
+    /// The name of the category in this Connections puzzle
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The color of the category in this Connections puzzle; Also used for sorting
+    /// </summary>
+    public ConnectionsColor Color { get; set; }
+
+    /// <summary>
+    /// The ID of the associated Connections puzzle
+    /// </summary>
+    public int ConnectionsPuzzleId { get; set; }
+
+    /// <summary>
+    /// The associated puzzle instance
+    /// </summary>
+    public virtual ConnectionsPuzzle? ConnectionsPuzzle { get; set; }
+
+    /// <summary>
+    /// The cards associated with this category
+    /// </summary>
+    public ICollection<ConnectionsCard> Cards { get; set; } = [];
+}