Add script to decode framework diag blinking video

Example

> ./util/fwk_diag_from_video.py ~/Downloads/20261026_155822.mp4
Video 1920x1080 @ 30.01 fps

28 blinks, period 400 ms

  time   slot           color   hue
   0.07s HW bit 2       green    140
   0.47s HW bit 3       green    140
   0.87s HW bit 4       green    140
   1.27s HW bit 5       green    140
   1.67s HW bit 6       green    140
   2.07s HW bit 7       green    140
   2.47s HW bit 8       green    140
   2.87s HW bit 9       green    140
   3.27s HW bit 10      green    139
   3.67s HW bit 11      green    139
   4.06s HW bit 12      green    140
   4.46s separator      amber     14
   4.86s BIOS bit 0     green    139
   5.26s BIOS bit 1     blue     240
   5.66s BIOS bit 2     blue     240
   6.06s BIOS bit 3     green    140
   6.46s BIOS bit 4     green    139
   6.86s BIOS bit 5     green    140
   7.26s BIOS bit 6     blue     240
   7.66s BIOS bit 7     blue     240
   8.06s BIOS bit 8     green    140
   8.46s BIOS bit 9     green    140
   8.86s BIOS bit 10    green    141
   9.26s BIOS bit 11    green    141
   9.66s BIOS bit 12    green    141
  10.06s BIOS bit 13    green    140
  10.46s BIOS bit 14    green    140
  10.86s BIOS bit 15    green    141

Not in video: start, HW bit 1

Hardware diagnostics (fw13):
   1 No battery                             ?
   2 HW PGOOD 3V5V                          ok
   3 VCCIN AUX VR (power bad, forced G3)    ok
   4 SLP_S4                                 ok
   5 HW PGOOD VR                            ok
   6 Touchpad                               ok
   7 Audio daughterboard                    ok
   8 Thermal sensor                         ok
   9 No fan                                 ok
  10 No S0                                  ok
  11 No DDR                                 ok
  12 No eDP                                 ok

Last port80 code: 0x00c6

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg