chore: rewrite project Claude config for FiscalFlow

- Rewrite .claude/CLAUDE.md with project-specific context: tech stack
  (.NET 10, React 18), solution structure, build commands, architecture
  decisions (DDD, CQRS, Provider pattern), domain concepts
- Rewrite AGENTS.md with layer-specific agent routing mapped to
  FiscalFlow architecture layers
- Remove invoice-master-poc-v2 reference from settings.json
- Clean settings.local.json: remove 100+ irrelevant entries from
  another project and hardcoded database password
- Remove everything-claude-code framework files (commands, hooks,
  skills) now managed at user level

.claude/settings.json

@@ -7,8 +7,7 @@
       "Edit(*)",
       "Glob(*)",
       "Grep(*)",
-      "Task(*)",
-      "Bash(wsl bash -c \"source ~/miniconda3/etc/profile.d/conda.sh && conda activate invoice-py311 && cd /mnt/c/Users/yaoji/git/ColaCoder/invoice-master-poc-v2 && pytest tests/web/test_batch_upload_routes.py::TestBatchUploadRoutes::test_upload_batch_async_mode_default -v -s 2>&1 | head -100\")"
+      "Task(*)"
     ]
   }
 }