Restructure into a monorepo: models, VS Code extension, daemon, shared

- models/: GGUFs (Git LFS), manifest.json, model card, Apache-2.0 LICENSE + NOTICE
- extensions/vscode/: the Local Autocomplete extension (v0.5.0, publisher harvmaster)
- daemon/: acd completion daemon (bundled into the extension; also runs standalone)
- shared/: prompt layout + symbol extraction shared with the training pipeline
- scripts/: make-model-release.mjs, publish-extension-release.mjs (Gitea releases)
- README with quick start, settings, architecture, build and release instructions;
  MIT license for code; CHANGELOG

The default model manifest URL moves to models/manifest.json.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

models/NOTICE

@@ -0,0 +1,7 @@
+These model files are modified versions of Qwen2.5-Coder-0.5B (https://huggingface.co/Qwen/Qwen2.5-Coder-0.5B),
+Copyright (c) Alibaba Cloud, licensed under the Apache License, Version 2.0 (see LICENSE).
+
+Modifications: full-parameter fine-tuning for suffix-first fill-in-the-middle completion
+(and, for stage-c, a repository/symbol-context header), followed by Q8_0 GGUF conversion.
+Fine-tuning data: permissively licensed (MIT) open-source TypeScript/Vue repositories and
+the publisher's own code. Secrets were scrubbed from the training data.