Added supply record backend.

Models/Supply/SupplyRecord.cs

@@ -0,0 +1,37 @@
+namespace CarCareTracker.Models
+{
+    public class SupplyRecord
+    {
+        public int Id { get; set; }
+        public int VehicleId { get; set; }
+        /// <summary>
+        /// When the part or supplies were purchased.
+        /// </summary>
+        public DateTime Date { get; set; }
+        /// <summary>
+        /// Part number can be alphanumeric.
+        /// </summary>
+        public string PartNumber { get; set; }
+        /// <summary>
+        /// Where the part/supplies were purchased from.
+        /// </summary>
+        public string PartSupplier { get; set; }
+        /// <summary>
+        /// Amount purchased, can be partial quantities such as fluids.
+        /// </summary>
+        public decimal Quantity { get; set; }
+        /// <summary>
+        /// Description of the part/supplies purchased.
+        /// </summary>
+        public string Description { get; set; }
+        /// <summary>
+        /// How much it costs
+        /// </summary>
+        public decimal Cost { get; set; }
+        /// <summary>
+        /// Additional notes.
+        /// </summary>
+        public string Notes { get; set; }
+        public List<UploadedFiles> Files { get; set; } = new List<UploadedFiles>();
+    }
+}

Models/Supply/SupplyRecordInput.cs

@@ -0,0 +1,27 @@
+namespace CarCareTracker.Models
+{
+    public class SupplyRecordInput
+    {
+        public int Id { get; set; }
+        public int VehicleId { get; set; }
+        public string Date { get; set; } = DateTime.Now.ToShortDateString();
+        public string PartNumber { get; set; }
+        public string PartSupplier { get; set; }
+        public decimal Quantity { get; set; }
+        public string Description { get; set; }
+        public decimal Cost { get; set; }
+        public string Notes { get; set; }
+        public List<UploadedFiles> Files { get; set; } = new List<UploadedFiles>();
+        public SupplyRecord ToSupplyRecord() { return new SupplyRecord { 
+            Id = Id, 
+            VehicleId = VehicleId, 
+            Date = DateTime.Parse(Date), 
+            Cost = Cost, 
+            PartNumber = PartNumber,
+            PartSupplier = PartSupplier,
+            Quantity = Quantity,
+            Description = Description, 
+            Notes = Notes, 
+            Files = Files }; }
+    }
+}