Add Api and startup check for sufficient storage capacity (#13888)

MediaBrowser.Model/System/FolderStorageInfo.cs

@@ -0,0 +1,32 @@
+namespace MediaBrowser.Model.System;
+
+/// <summary>
+/// Contains information about a specific folder.
+/// </summary>
+public record FolderStorageInfo
+{
+    /// <summary>
+    /// Gets the path of the folder in question.
+    /// </summary>
+    public required string Path { get; init; }
+
+    /// <summary>
+    /// Gets the free space of the underlying storage device of the <see cref="Path"/>.
+    /// </summary>
+    public long FreeSpace { get; init; }
+
+    /// <summary>
+    /// Gets the used space of the underlying storage device of the <see cref="Path"/>.
+    /// </summary>
+    public long UsedSpace { get; init; }
+
+    /// <summary>
+    /// Gets the kind of storage device of the <see cref="Path"/>.
+    /// </summary>
+    public string? StorageType { get; init; }
+
+    /// <summary>
+    /// Gets the Device Identifier.
+    /// </summary>
+    public string? DeviceId { get; init; }
+}