feat: add Model Deck

[0xTotoroX]

Summary

• add Model Deck 0.1.0 as scripts/model-deck.js
• register its market metadata, homepage, raw URL, and SHA-256 in index.json
• provide a hover-triggered model/reasoning matrix with Fast switching and reusable global presets

Screenshots

Hover panel and trigger

Preset actions

Relationship to #47

This is a separate interaction model from #47. That PR embeds a matrix/slider in the official menu; Model Deck opens an independent panel when the official model button is hovered, preserves the official click menu, and adds Fast switching plus global presets with preview, ordering, rename, and delete.

Model Deck derives capabilities from the correlated official model/list response and applies configuration through official menus with read-back confirmation. It does not read or write React private state.

Verification

• npm run check in 0xTotoroX/model-deck: 77/77 tests passed
• node --check scripts/model-deck.js
• validated the index schema, required fields, ISO timestamp, and unique script IDs with jq
• verified the market script is byte-identical to 0xTotoroX/model-deck
• SHA-256: 6a085811d626bbe9ded8e73baf9fbaf719f30297e0ce58c35259a083a056ad2d

Homepage: https://github.com/0xTotoroX/model-deck