Clean up unused files, organize structure, update docs

- Delete obsolete files: data_fetcher_old.py, market_old.py, base_strategy.py (root),
  strategy_sma_cross.py, and old architecture remnants (address_monitor.py,
  position_monitor.py, trade_log.py, wallet_data.py, whale_tracker.py)
- Delete zero-byte Docker artifacts and runtime files (clp_hedger.log,
  clp_hedger/hedge_status.json)
- Move one-off utility scripts to scripts/ directory
- Move example/template files to .temp/ directory
- Update .gitignore: add entries for clp_hedger.log, clp_hedger/hedge_status.json,
  Docker layer hash files, Using, Running, and backups/
- Update .dockerignore: add clp_hedger.log, clp_hedger/hedge_status.json, backups/
- Create example config files: _data/strategies.json.example,
  _data/backtesting_conf.json.example, _data/coin_precision.json.example
- Update GEMINI.md: remove outdated session summaries and duplicate review section
- Update review.md: add cleanup status section, update remaining recommendations
- Update MIGRATION_PLAN.md: mark completed phases, update file references
- Update DOCKER_MIGRATION_GUIDE.md: update import_csv.py path reference

_data/strategies.json.example

@@ -0,0 +1,50 @@
+{
+    "sma_cross_1": {
+        "enabled": false,
+        "class": "strategies.ma_cross_strategy.MaCrossStrategy",
+        "agent": "scalper_agent",
+        "parameters": {
+            "coin": "ETH",
+            "timeframe": "15m",
+            "short_ma": 7,
+            "long_ma": 44,
+            "size": 0.0055,
+            "leverage_long": 5,
+            "leverage_short": 5
+        }
+    },
+    "sma_44d_btc": {
+        "enabled": false,
+        "class": "strategies.single_sma_strategy.SingleSmaStrategy",
+        "parameters": {
+            "agent": "swing",
+            "coin": "BTC",
+            "timeframe": "1d",
+            "sma_period": 44,
+            "size": 0.0001,
+            "leverage_long": 3,
+            "leverage_short": 1
+        }
+    },
+    "copy_trader_eth": {
+        "enabled": true,
+        "is_event_driven": true,
+        "class": "strategies.copy_trader_strategy.CopyTraderStrategy",
+        "parameters": {
+            "agent": "scalper",
+            "target_address": "0x32885a6adac4375858E6edC092EfDDb0Ef46484C",
+            "coins_to_copy": {
+                "ETH": {
+                    "size": 0.0055,
+                    "leverage_long": 3,
+                    "leverage_short": 3
+                },
+                "BTC": {
+                    "size": 0.0002,
+                    "leverage_long": 1,
+                    "leverage_short": 1
+                }
+            }
+        }
+    }
+}