Add Jellyfin.Model.Tests project to the solution

Jellyfin.sln

@@ -74,6 +74,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Jellyfin.Dlna.Tests", "test
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.XbmcMetadata.Tests", "tests\Jellyfin.XbmcMetadata.Tests\Jellyfin.XbmcMetadata.Tests.csproj", "{30922383-D513-4F4D-B890-A940B57FA353}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.Model.Tests", "tests\Jellyfin.Model.Tests\Jellyfin.Model.Tests.csproj", "{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -200,6 +202,10 @@ Global
 		{30922383-D513-4F4D-B890-A940B57FA353}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{30922383-D513-4F4D-B890-A940B57FA353}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{30922383-D513-4F4D-B890-A940B57FA353}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -214,6 +220,7 @@ Global
 		{42816EA8-4511-4CBF-A9C7-7791D5DDDAE6} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 		{B8AE4B9D-E8D3-4B03-A95E-7FD8CECECC50} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 		{30922383-D513-4F4D-B890-A940B57FA353} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
+		{FC1BC0CE-E8D2-4AE9-A6AB-8A02143B335D} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3448830C-EBDC-426C-85CD-7BBB9651A7FE}