ShareLinks plugin: guest share links for Jellyfin

Includes fix for redemption failing with DbUpdateConcurrencyException:
change the guest password before applying the user policy, since
UpdatePolicyAsync bumps the user's EF concurrency token and a stale
instance then breaks ChangePassword.

Jellyfin.Plugin.ShareLinks/Jellyfin.Plugin.ShareLinks.csproj

@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <LangVersion>latest</LangVersion>
+    <RootNamespace>Jellyfin.Plugin.ShareLinks</RootNamespace>
+    <AssemblyName>Jellyfin.Plugin.ShareLinks</AssemblyName>
+    <Version>1.0.0.0</Version>
+    <AssemblyVersion>1.0.0.0</AssemblyVersion>
+    <FileVersion>1.0.0.0</FileVersion>
+    <GenerateAssemblyInfo>true</GenerateAssemblyInfo>
+    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
+    <ImplicitUsings>disable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Jellyfin.Controller" Version="10.11.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Include="Web\**\*.*" />
+  </ItemGroup>
+
+</Project>