Bring in frame-hands' hand tracking under hands/

The history of frame-hands (~/Desktop/Projects/frame-hands on the
Frame), filtered to what moves: the camera broker (camd/), the tracker
and its offline tools (trackd/), the shared file layouts (include/), the
ncnn models, the analysis tools, and the calibration and model helpers
they import from the Python prototype. The reverse-engineering notes,
probes, camprobe, and the rest of the prototype stay in frame-hands.
Unchanged here: the renames to ft- names and Frametop paths follow.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

hands/camd/LICENSE.FrameEyeCameraFeed

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+MIT License
+
+Copyright (c) 2026 Curtis English
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
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+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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