Unpin third-party software

@ffmpeg/ffmpeg 0.12.15 (MIT): see FFMPEG-WASM-LICENSE.txt
Source: https://github.com/ffmpegwasm/ffmpeg.wasm

@ffmpeg/core 0.12.10: FFmpeg compiled with external libraries including x264.
See FFMPEG-CORE-GPLv3.txt. Corresponding upstream build recipes and source references:
https://github.com/ffmpegwasm/ffmpeg.wasm/releases/tag/v0.12.10
https://github.com/ffmpegwasm/ffmpeg.wasm/tree/main/build
https://github.com/ffmpegwasm/ffmpeg.wasm/tree/main/packages/core
The WebAssembly binary is shipped unmodified, split into core.part00/01/02 for transport. Concatenate the three pieces in order to reconstruct it.

ImageTracerJS 1.2.6: The Unlicense (public domain); full notice embedded in imagetracer.js.
https://github.com/jankovicsandras/imagetracerjs

HEIC decoding: heic2any 0.0.4, MIT; see HEIC2ANY-LICENSE.txt and embedded third-party notices in heic2any.min.js. Source: https://github.com/alexcorvi/heic2any

Background removal: U²-Net-P, Xuebin Qin and contributors, Apache-2.0 (U2NET-LICENSE.txt). Source: https://github.com/xuebinqin/U-2-Net; ONNX distribution: https://github.com/danielgatis/rembg/releases/download/v0.0.0/u2netp.onnx; verified MD5 8e83ca70e441ab06c318d82300c84806.
ONNX Runtime Web 1.20.1, Microsoft, MIT (ORT-LICENSE.txt; ORT-THIRD-PARTY-NOTICES.txt). https://github.com/microsoft/onnxruntime/tree/v1.20.1
SVG tracing: ImageTracer.js 1.2.6, Andras Jankovics, Unlicense (license included in imagetracer.js). https://github.com/jankovicsandras/imagetracerjs

Supabase JS 2.117.2 and its Supabase client packages, MIT license, https://github.com/supabase/supabase-js. See SUPABASE-LICENSE.txt.

Speech noise reduction: @jitsi/rnnoise-wasm 0.2.1, synchronous RNNoise 0.2 WebAssembly build. Apache-2.0 wrapper notices: RNNOISE-WASM-LICENSE.txt. Source: https://github.com/jitsi/rnnoise-wasm ; RNNoise source: https://github.com/xiph/rnnoise .
RNNoise BSD-3-Clause license: RNNOISE-LICENSE.txt.