Toolnoza speech export source

Worker integration: GPL-3.0-or-later. meSpeak/eSpeak: GNU GPL. LAME JavaScript encoder: LGPL-3.0. Upstream notices are preserved in dependencies.

Packages: mespeak 2.0.2; @breezystack/lamejs 1.2.7. Sources: https://github.com/mikolalysenko/mespeak and https://github.com/shijinyu/lamejs and https://www.masswerk.at/mespeak/ .

Build as a module web worker with Vite/TypeScript, using a commonjs transform for the mespeak package, and JSON module imports. No API key or server is used.

Compatibility patch: the vendored ESpeak.js is transcoded from legacy single-byte encoding to UTF-8; NOTICE is included. Worker now imports that vendored copy.
