refactor!: rename the project from Monitor to MoShiro [CI]

Namespaces, assemblies, solution, binaries, images, systemd units, config paths, environment variables, protocol methods and the Linux user are all renamed. Breaking: existing databases, node identities and installed units must be recreated.

backend/probe/tests/MoShiro.Probe.Tests/MoShiro.Probe.Tests.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="xunit.v3" />
-    <ProjectReference Include="..\..\src\Monitor.Probe\Monitor.Probe.csproj" />
+    <ProjectReference Include="..\..\src\MoShiro.Probe\MoShiro.Probe.csproj" />
   </ItemGroup>
   <ItemGroup>
     <Using Include="Xunit" />

backend/probe/tests/MoShiro.Probe.Tests/ProbeTests.cs

@@ -1,8 +1,8 @@
 using Fleet.Core;
 using Fleet.Hosting;
-using Monitor.Protocol;
+using MoShiro.Protocol;
 
-namespace Monitor.Probe.Tests;
+namespace MoShiro.Probe.Tests;
 
 public sealed class ProbeTests
 {