refactor(build): Centralize generated files and clean up project layout

- Task A: Centralized all generated code (assets, timeline) into a single  directory to create a single source of truth.
- Task A: Isolated test asset generation into a temporary build directory, preventing pollution of the main source tree.
- Task B: Vertically compacted all C/C++ source files by removing superfluous newlines.
- Task C: Created a top-level README.md with project overview and file descriptions.
- Task D: Moved non-essential documentation into a  directory to reduce root-level clutter.

1 files changed, 0 insertions, 44 deletions

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-# spectrogram editing tool in a browser
-
-The sub-project is about have an editing tool in a browser
-that will allow generating, editing, compacting .spec files
-
-## the idea
-
-We want a web page (html+javascript) capable of:
-   * loading a .wav file and showing the spectrogram (IDCT_SIZE=512)
-   * compacting this spectrogram if needed
-   * generating the .spec file
-   * allowing some editing on the spectrogram
-   * and most importantly: allowing the compression of this spectrogram using elementary bricks like bezier-curves (with a large stroke width /
-   brushes), rectangle, noise addition, etc.
-
-These tools must be available in the web editor (in javascript) as well as
-in c++ equivalent too.
-
-The idea is the compress the .wav spectrogram using elementary bricks and
-simple representation (as well as being dynamic) during the demo: we
-generate the audio on the fly by 'drawing' the spectrograms and passing them
-to the synth
-
-## the work
-
-Analyze the requirement for the HTML tool. It must remain simple and easy to
-use. Don't over-engineer it.
-Still, the tool must have a decent load/save offer, to:
-  * load the .wav
-  * save the .spec
-  * save/export the descriptive compressed version in vectorial form (like the SVG format, in fact)
-  * be able to load this vectorial form
-
-Then we need a reader for the vectorial form in c++ to use in the demo.
-We also need to elementary tools / bricks to: draw a line / bezier curve /
-rectangle, ellipse, etc. in frequency domain, to generate the spectrogram on
-the flight.
-We also need controllable random noise generation to add some 'texture' to
-the spectrogram.
-
-## the files
-the HTML/JS tool should be under tools/editor
-the c++ code should be added to the library under src/audio/
-