refactor: split flat root into env/, core/, ui/ domain packages

Fix UI styling: kicker padding, centering, and vertical formatting of list items in output cards

Refactor codebase to enforce top-level imports, clean comments, remove inline ignores, and expand UI examples

Remove redundant custom env loader to maintain a clean and concise codebase

Add custom .env loader searching from submodule to parent workspace, and fix transformers dtype warning

refactor: simplify project structure to flat root level layout, add pyright typechecking, and add code comments

Simplify UI, remove dropdowns, apply Codex dark theme, and resolve Gradio warnings

feat: add zerogpu runtime path

style: polish NeighborDocs UI

fix: suppress hf asyncio cleanup noise

refactor: simplify project structure

docs: expand NeighborDocs hackathon scaffold

feat: scaffold NeighborDocs MVP