add Nintendo Entertainment System

Consider expanding beyond handhelds. Some steps of this:

- [x] Find a couple of maintainers to take care of the entries database
- [x] Create a "nesdev" database repo (equivalent to https://github.com/gbdev/database) https://github.com/nesdev-org/homebrew-db
- [x] Add entries for a game and a tool, to test categories. Could use \[Thwaite](https://github.com/pinobatch/thwaite-nes) and [240p Test Suite](https://github.com/pinobatch/240p-test-mini)\
- [ ] Add filters and specific NES pages on the frontend
- [ ] Add NES emulation capabilities on the frontend with [binjnes](https://github.com/binji/binjnes) or [RusticNES](https://github.com/zeta0134/rusticnes-wasm)
https://github.com/gbdev/virens/issues/51

Review the unchecked checklist items for frontend filters, specific NES pages, and NES emulation. Read the linked binjnes and RusticNES projects, then compare them with the existing frontend and emulator integration. Done means NES browsing and emulation capabilities are implemented and the remaining checklist items are complete.

Written by the indexing model from the issue text.