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/fleet/src/Fleet.Rpc/FleetMethods.cs

@@ -58,7 +58,7 @@ public sealed class HelloParams
     [JsonPropertyName("now_utc_ms")]
     public long NowUtcMs { get; set; }
 
-    /// <summary>产品自定义的元数据（例如 Monitor 的 tls_spki、probe_ports、local_limits 摘要）。</summary>
+    /// <summary>产品自定义的元数据（例如 MoShiro 的 tls_spki、probe_ports、local_limits 摘要）。</summary>
     [JsonPropertyName("meta")]
     public JsonElement? Meta { get; set; }
 }