Added ASP.NET backend with SQLite

backend/MuiCharts.Domain/Repositories/IPointRepository.cs

@@ -0,0 +1,44 @@
+using ErrorOr;
+using MuiCharts.Domain.Models;
+
+namespace MuiCharts.Domain.Repositories;
+
+/// <summary>
+/// Represents a repository for managing points.
+/// </summary>
+public interface IPointRepository
+{
+	/// <summary>
+	/// Adds a new point asynchronously.
+	/// </summary>
+	/// <param name="point">The point to add.</param>
+	/// <returns>A task that represents the asynchronous operation. The task result contains the added point or an error.</returns>
+	Task<ErrorOr<Point>> AddPointAsync(Point point);
+
+	/// <summary>
+	/// Retrieves a point by its ID asynchronously.
+	/// </summary>
+	/// <param name="id">The ID of the point to retrieve.</param>
+	/// <returns>A task that represents the asynchronous operation. The task result contains the retrieved point or an error.</returns>
+	Task<ErrorOr<Point>> GetPointAsync(int id);
+
+	/// <summary>
+	/// Retrieves a range of points asynchronously.
+	/// </summary>
+	/// <returns>A task that represents the asynchronous operation. The task result contains a queryable collection of points.</returns>
+	Task<IQueryable<Point>> GetPointsRangeAsync();
+
+	/// <summary>
+	/// Adds or updates a point asynchronously.
+	/// </summary>
+	/// <param name="point">The point to add or update.</param>
+	/// <returns>A task that represents the asynchronous operation. The task result contains the added or updated point or an error.</returns>
+	Task<ErrorOr<Point?>> AddOrUpdatePointAsync(Point point);
+
+	/// <summary>
+	/// Deletes a point by its ID asynchronously.
+	/// </summary>
+	/// <param name="id">The ID of the point to delete.</param>
+	/// <returns>A task that represents the asynchronous operation. The task result contains a flag indicating if the point was deleted successfully or an error.</returns>
+	Task<ErrorOr<Deleted>> DeletePointAsync(int id);
+}