refactor(scripts): move logic to src and standardize entry points

[JacksonFergusonDev]

Summary

This PR refactors the scripts/ directory to adhere to the "scripts as triggers, src as engine" philosophy. Imperative logic (plotting, signal generation, capture loops) has been moved from individual scripts into reusable modules within src/. All scripts have been standardized to use the def main(): pattern.

Key Changes

🏗️ Architecture

• Scripts: Now strictly CLI wrappers. They parse arguments, load config, call a library function, and exit.
• Src: Expanded to include all business logic for audio synthesis, plotting, and experiment orchestration.

🔄 Logic Relocation

Original Script	Moved To	New Function
fun/neon_torus.py	src/audio.py	generate_drone
fun/record_drone.py	src/audio.py	generate_pulsing_drone
fun/render_landscape.py	src/io.py	load_latest_file
viz/joyplot.py	src/plots.py	plot_joyplot_stacked
fun/neon_torus.py	src/plots.py	plot_phase_portrait
fun/render_landscape.py	src/plots.py	plot_spectral_landscape
viz/playback_scope.py	src/viz.py	run_playback_scope
capture/stream.py	src/experiments.py	capture_continuous_stream

🧹 Standardization

• All scripts in scripts/ now use the def main(): ... if __name__ == "__main__": main() pattern to prevent global variable leakage and improve testability.
• Consolidated duplicate capture logic in master_transfer.py to use src.experiments.

Testing

• Verified that all visualization scripts (joyplot, render_landscape) can still locate files and generate plots using the new library functions.
• Verified that capture scripts (stream, record_drone) correctly interface with src.daq.