refactor(di): migrate Integrations + IPC layer to ILogger<T> (DI-4 Slice B)

Seven services across Integrations/, Ipc/ and GameFunctions/ shift
from Plugin.LogProxy to Microsoft.Extensions.Logging.ILogger<T>.

Files with live LogProxy sites (10 in total):
- Ipc/ExtraChat (1)
- GameFunctions/Chat (6)
- GameFunctions/GameFunctions (2)
- GameFunctions/KeybindManager (1)

Foundation-touch files (no current sites, ctor takes ILogger<T> as
seed for the v1.5.7-11 Plugin-Integrations wave):
- Integrations/HonorificService (also drops the local IPluginLog
  _log field in favour of ILogger<HonorificService> _logger; the
  three _log.* calls there are migrated as a bonus since the field
  had to change anyway)
- IpcManager
- Ipc/TypingIpc

GameFunctions takes ILoggerFactory as an extra ctor arg so it can
hand a typed logger to its nested Chat and KeybindManager (same
pattern MessageStore + MessageEnumerator use in Slice A).

PluginHostFactory factory lambdas updated for all five Slice B
services that need extra resolves.

Plan drift D8: GameFunctions.TryOpenAdventurerPlate is an internal
static method whose only Warning call cannot reach the instance
_logger. The one site stays on Plugin.LogProxy with an inline note;
promoting it to instance + PayloadHandler.cs:814 call-site update is
a v1.5.1+ cleanup, out of DI-4 Slice B scope.

HellionChat/Ipc/ExtraChat.cs

@@ -1,9 +1,12 @@
 using Dalamud.Plugin.Ipc;
+using Microsoft.Extensions.Logging;
 
 namespace HellionChat.Ipc;
 
 public sealed class ExtraChat : IDisposable
 {
+    private readonly ILogger<ExtraChat> _logger;
+
 #pragma warning disable CS0649 // Assigned through IPC
     [Serializable]
     private struct OverrideInfo
@@ -36,8 +39,9 @@ public sealed class ExtraChat : IDisposable
     private volatile Dictionary<Guid, string> ChannelNamesInternal = new();
     internal IReadOnlyDictionary<Guid, string> ChannelNames => ChannelNamesInternal;
 
-    internal ExtraChat()
+    internal ExtraChat(ILogger<ExtraChat> logger)
     {
+        _logger = logger;
         OverrideChannelGate = Plugin.Interface.GetIpcSubscriber<OverrideInfo, object>(
             "ExtraChat.OverrideChannelColour"
         );
@@ -62,10 +66,7 @@ public sealed class ExtraChat : IDisposable
         catch (Exception ex)
         {
             // ExtraChat is optional; IPC failure is normal when the plugin isn't loaded.
-            Plugin.LogProxy.Verbose(
-                ex,
-                "ExtraChat IPC initial state query failed (peer not loaded?)"
-            );
+            _logger.LogTrace(ex, "ExtraChat IPC initial state query failed (peer not loaded?)");
         }
     }