#102: Moving Models and constants to their own library

Models/Constants/DirectoryPaths.cs

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+namespace Icarus.Constants;
+
+public class DirectoryPaths
+{
+    public static string CoverArtDirectory => Directory.GetCurrentDirectory() + "/Images/Stock/";
+    public static string CoverArtFilename => "CoverArt.png";
+    public static string FILENAME_CHARACTERS = "ABCDEF0123456789";
+    public static int FILENAME_LENGTH = 25;
+}

Models/Constants/FileExtensions.cs

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+namespace Icarus.Constants;
+
+public class FileExtensions
+{
+    // Contains the default audio file extension with period at the beginning
+    public static string DEFAULT_AUDIO_EXTENSION = WAV_EXTENSION!;
+
+    // Contains file extension with period at the beginning
+    public static string MP3_EXTENSION = ".mp3";
+
+    // Contains file extension with period at the beginning
+    public static string WAV_EXTENSION = ".wav";
+
+    // Contains file extension with period at the beginning
+    public static string JPG_EXTENSION = ".jpg";
+
+    // Contains file extension with period at the beginning
+    public static string FLAC_EXTENSION = ".flac";
+
+    // Contains file extension with period at the beginning
+    public static string ZIP_EXTENSION = ".zip";
+}

Models/Models.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <PackageId>Icarus.Models</PackageId>
+    <Product>Icarus.Models</Product>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="newtonsoft.json" Version="13.0.3" />
+  </ItemGroup>
+
+</Project>