Add slide and rotate interactive captcha solvers

New solver subsystem with independent models:
- GapDetectorCNN (1x128x256 grayscale → sigmoid) for slide gap detection
- RotationRegressor (3x128x128 RGB → sin/cos via tanh) for rotation angle prediction
- SlideSolver with 3-tier strategy: template match → edge detect → CNN fallback
- RotateSolver with ONNX sin/cos → atan2 inference
- Generators, training scripts, CLI commands, and slide track utility

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

models/__init__.py

@@ -1,21 +1,27 @@
 """
 模型定义包
 
-提供四种模型：
+提供六种模型：
 - CaptchaClassifier: 调度分类器 (轻量 CNN, < 500KB)
 - LiteCRNN: 轻量 CRNN (普通字符 + 算式, < 2MB)
 - ThreeDCNN: 3D 文字验证码专用模型 (ResNet-lite + BiLSTM, < 5MB)
 - RegressionCNN: 回归 CNN (3D 旋转 + 滑块, ~1MB)
+- GapDetectorCNN: 滑块缺口检测 CNN (~1MB)
+- RotationRegressor: 旋转角度回归 sin/cos 编码 (~2MB)
 """
 
 from models.classifier import CaptchaClassifier
 from models.lite_crnn import LiteCRNN
 from models.threed_cnn import ThreeDCNN
 from models.regression_cnn import RegressionCNN
+from models.gap_detector import GapDetectorCNN
+from models.rotation_regressor import RotationRegressor
 
 __all__ = [
     "CaptchaClassifier",
     "LiteCRNN",
     "ThreeDCNN",
     "RegressionCNN",
+    "GapDetectorCNN",
+    "RotationRegressor",
 ]