Update .gitignore: exclude plugin build artifacts and local Claude settings

Keeps existing ignores intact. Adds:
- Plugin Binaries/ and Intermediate/ (generated on first compile)
- *.sln / *.suo (generated by UE project regeneration)
- .claude/settings.local.json (machine-specific, not shared)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,7 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(dir /s \"E:\\\\ASTERION\\\\GIT\\\\PS_AI_Agent\")"
-    ]
-  }
-}

.gitignore

@@ -4,3 +4,14 @@ Unreal/PS_AI_Agent/Binaries/
 Unreal/PS_AI_Agent/Intermediate/
 Unreal/PS_AI_Agent/Saved/
 ConvAI/Convai/Binaries/
+
+# Plugin build artifacts
+Unreal/PS_AI_Agent/Plugins/PS_AI_Agent_ElevenLabs/Binaries/
+Unreal/PS_AI_Agent/Plugins/PS_AI_Agent_ElevenLabs/Intermediate/
+
+# UE5 generated solution files
+Unreal/PS_AI_Agent/*.sln
+Unreal/PS_AI_Agent/*.suo
+
+# Claude Code local session settings (machine-specific, memory files in .claude/ are kept)
+.claude/settings.local.json