Fix a bunch of warnings (#10886)

* Fix a bunch of warnings

Also made ensnareable not broadcast as they're only used directed.
Mainly just Get<T> and AppearanceSystem

* buckle too

* fix tests

Co-authored-by: wrexbe <wrexbe@protonmail.com>

Content.IntegrationTests/Tests/Lobby/ServerReloginTest.cs

@@ -8,7 +8,7 @@ using Robust.Shared.IoC;
 using Robust.Shared.Network;
 namespace Content.IntegrationTests.Tests.Lobby;
 
-public class ServerReloginTest
+public sealed class ServerReloginTest
 {
     [Test]
     public async Task Relogin()