test(gl): regression coverage for camera angles and Scene.select

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Description

Adds focused regression tests for recent GL scene/camera changes: angle wrapping and smoothing in the module designer camera stack, and Scene.select behavior when callers pass a GITObject.

Type of Change

• ✅ Test addition or update

Package(s) Affected

• PyKotor (core library)

Risky behavior now covered

• Camera.rotate: _wrap_angle_pi behavior for yaw and pitch when clamp=False, including a full (2\pi) yaw delta; inverted lower_limit / upper_limit clamp path (midpoint, no crash).
• CameraController._lerp_angle: shortest arc across the (\pm\pi) seam (relevant to smoothing after orbit/wrap fixes).
• CameraController._determine_mode: InputState.pan_button forces pan mode (documented for Ctrl+LMB-style bindings).
• Scene.select: resolves a GITObject to the RenderObject whose .data matches; clear_existing clears vs append; unknown GIT leaves selection empty when clearing.

Test files added/updated

• Libraries/PyKotor/tests/gl/test_camera_controller.py — extended.
• Libraries/PyKotor/tests/gl/test_scene_select.py — new.

Why these tests materially reduce regression risk

Camera math bugs surface as subtle viewport drift, gimbal-like jumps, or wrong smoothing after large rotations; the new tests pin the wrap and shortest-path interpolation contracts. Selection bugs break the editor workflow when code passes GIT instances instead of render wrappers; the new tests lock the resolution and multi-select semantics without requiring a GL context (stub + bound Scene.select).

Testing

• PYTHONPATH=Libraries/PyKotor/src:Libraries/bioware-kaitai-formats/src QT_QPA_PLATFORM=offscreen python3 -m pytest --import-mode=importlib -m "not gui and not slow" --timeout=120 Libraries/PyKotor/tests/gl/test_camera_controller.py Libraries/PyKotor/tests/gl/test_scene_select.py
• pyright on the two test files (0 issues).

Note: Scene() full construction compiles shaders and can fail headless; test_scene_select uses a minimal stub with _module is None so SceneCache.build_cache is a no-op, while still executing the real Scene.select implementation.

Checklist

• My code follows the project's style guidelines
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes