Add spinning logo on loading

[pburkholder]

Changes proposed in this pull request:

• Adds a spinning GIF logo

Things to check

• For any logging statements, is there any chance that they could be logging sensitive data?
  N/A
• Are log statements using a logging library with a logging level set? Setting a logging level means that log statements "below" that level will not be written to the output. For example, if the logging level is set to INFO and debugging statements are written with log.debug or similar, then they won't be written to the otput, which can prevent unintentional leaks of sensitive data.
  N/A

Security considerations

None. Adds a logo

[pburkholder]

Here's the gist of the generation script:

# Input and output files
input="input.gif"
output="spinning.gif"

# Number of frames for one full rotation
frames=19

# Temporary directory for frames
mkdir -p frames

# Generate each frame
for i in $(seq 0 $((frames - 1))); do
  # Calculate the angle of rotation (0 to 360 degrees)
  angle=$((i * 180 / frames))

  # Calculate horizontal scaling factor to simulate perspective
  scale=$(echo "abs(c($angle * 3.14159 / 180))" | bc -l )
  scale_percent=$( echo "100 * $scale" | bc )
  echo resize $scale_percent%x100% 

  # Scale the image horizontally (mimics the 3D spin effect)
  convert "$input" \
    -resize $scale_percent%x100% \
    -gravity center \
    -background "#f0f2f4" \
    -extent 109x144 \
    frames/frame-$(printf "%02d" $i).gif
done

# Combine the frames into an animated GIF
convert -delay 15 -loop 0 frames/frame-*.gif "$output"

With some help from AIs out there.