hsfzxjy/handwriter.ttf: Handwriting synthesis with Harfbuzz WASM.

A proof-of-concept handwriting synthesizer uses Harfbuzz WASM Shaper to generate and rasterize handwriting-style fonts. Backed by a lightweight RNN model, the synthesizer runs within applications linked against libharfbuzz with experimental WASM shaper enabled. A prebuilt Docker image simplifies setup. The project follows Alex Graves's RNN for handwriting synthesis and includes various optimizations for performance improvements.