Owner's reorganisation: frame into 2009-fpga, media regrouped, old math versions removed

- original-frame/ moves into 2009-fpga/original-frame/ (the FPGA version introduced the frame).
- Media regrouped by the owner: the two 2011-07-01 PNGs and MOV02256-02259 to FireFly, SNC00198.jpg to the FPGA version.
- Removed from the current version (still in the history): docs/math wisFORlive.docx, wisFORlive3.docx, wisFORlive4.docx and 'z axis rotation.url'.
- READMEs, 2026-current/CLAUDE.md and the root timeline updated to match.

2009-fpga/README.md

@@ -1,9 +1,10 @@
 # 2009–2011: the FPGA version
 
-The first hexapod, built on the original frame (`../original-frame/`) and driven by an FPGA.
-The FPGA code has not survived; what is left are the photos and videos in `media/`, among them
-`hexapod film 18-11-09.wmv`.
+The first hexapod, driven by an FPGA. Its frame, `original-frame/`, was the mechanical base of every
+version up to 2023. The FPGA code has not survived; what is left are the photos and videos in `media/`,
+among them `hexapod film 18-11-09.wmv`.
 
-`media/` holds every hexapod photo and video created on or before 2 November 2011 20:44:07; everything later
-is in `../2011-firefly-mega-ssc32/media/`. (Most dates are copy dates, so the split follows the owner's check
-of the files, not the exact moment each photo was taken. `DSCF*` photos carry a camera date of 2003.)
+- `original-frame/` – the leg, body and bracket designs (DXF/DWG, 2009–2011).
+- `media/` – photos and videos of the FPGA version, sorted by the owner; those of the FireFly version are in
+  `../2011-firefly-mega-ssc32/media/`. (Most file dates are copy dates. `DSCF*` photos carry a camera date
+  of 2003.)