refactor(layout): rename multi_swarm → multi_swarm_core con doppia nidificazione uv workspace

- mv src/multi_swarm → src/multi_swarm_core/multi_swarm_core (member layout)
- sed-replace globale degli import: from/import multi_swarm.* → multi_swarm_core.*
- 115 occorrenze aggiornate in src/ scripts/ tests/
- multi_swarm_coevolutive (nome repo) preservato dal word boundary

Pre-condizione per il setup uv workspace della Fase 3.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.omc/state/last-tool-error.json

@@ -0,0 +1,7 @@
+{
+  "tool_name": "Bash",
+  "tool_input_preview": "{\"command\":\"find /opt/docker/multi_swarm_coevolutive -name \\\"config.py\\\" | xargs grep -l \\\"DATA_DIR\\\\|STRATEGIES\\\\|STATE\\\" 2>/dev/null\"}",
+  "error": "Exit code 123",
+  "timestamp": "2026-05-15T17:03:17.335Z",
+  "retry_count": 1
+}