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/Integrations/HonorificService.cs

@@ -2,6 +2,7 @@ using System;
 using Dalamud.Plugin;
 using Dalamud.Plugin.Ipc;
 using Dalamud.Plugin.Services;
+using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
 
 namespace HellionChat.Integrations;
@@ -23,7 +24,7 @@ internal sealed class HonorificService : IDisposable
     private readonly ICallGateSubscriber<object> _ready;
     private readonly ICallGateSubscriber<object> _disposing;
 
-    private readonly IPluginLog _log;
+    private readonly ILogger<HonorificService> _logger;
     private readonly IFramework _framework;
     private bool _versionWarningLogged;
 
@@ -34,12 +35,12 @@ internal sealed class HonorificService : IDisposable
 
     public HonorificService(
         IDalamudPluginInterface pluginInterface,
-        IPluginLog log,
+        ILogger<HonorificService> logger,
         IFramework framework
     )
     {
         _framework = framework;
-        _log = log;
+        _logger = logger;
 
         // Gate objects are cached per-name by Dalamud and safe to register
         // before Honorific loads — they just won't fire until it does.
@@ -84,7 +85,7 @@ internal sealed class HonorificService : IDisposable
             {
                 if (!_versionWarningLogged)
                 {
-                    _log.Warning(
+                    _logger.LogWarning(
                         "Honorific API version mismatch — expected major 3, "
                             + "found {Major}.{Minor}. Disabling Honorific integration.",
                         version.Item1,
@@ -104,7 +105,7 @@ internal sealed class HonorificService : IDisposable
         catch (Exception ex)
         {
             // Honorific not installed or not yet initialised — Ready will retry.
-            _log.Debug(ex, "Honorific not available at HellionChat startup; awaiting Ready.");
+            _logger.LogDebug(ex, "Honorific not available at HellionChat startup; awaiting Ready.");
             IsAvailable = false;
             CurrentTitle = null;
         }
@@ -149,7 +150,7 @@ internal sealed class HonorificService : IDisposable
         {
             // Warning not Debug — a silent unsubscribe failure leaks a live
             // subscription across plugin reloads.
-            _log.Warning(
+            _logger.LogWarning(
                 ex,
                 "Honorific unsubscribe failed (likely API break or gate already gone)."
             );