Refactor: rename OpenAIReceiptParser to AIReceiptParser

Rename to reflect multi-provider support (OpenAI + Anthropic):
- Rename Services/OpenAIReceiptParser.cs to Services/AIReceiptParser.cs
- Update class name from OpenAIReceiptParser to AIReceiptParser
- Update DI registration in Program.cs

The parser now supports both OpenAI and Anthropic models, so the more generic name better reflects its capabilities.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.claude/settings.local.json

@@ -4,7 +4,13 @@
       "Bash(git add:*)",
       "Bash(git commit:*)",
       "Bash(dotnet ef migrations:*)",
-      "Bash(dotnet ef database:*)"
+      "Bash(dotnet ef database:*)",
+      "Bash(mkdir \"C:\\Users\\AJ\\Desktop\\MoneyMap\\MoneyMap\\Prompts\")",
+      "Bash(dotnet build)",
+      "Bash(dotnet build --no-restore /p:UseAppHost=false)",
+      "Bash(dotnet build /property:UseAppHost=false)",
+      "Bash(git reset --soft d0f4b42)",
+      "Bash(git reset HEAD)"
     ],
     "deny": [],
     "ask": []