fix(simulation): normalize named key presses

[kitlangton]

What

Make ui.press interpret lowercase semantic key names such as escape through OpenTUI's named-key table instead of typing the name as literal text.

Closes #37511.

Before / After

Before: ui.press({ key: "escape" }) forwarded escape directly to OpenTUI's case-sensitive test input API, which emitted the seven literal characters. Callers had to send the raw escape byte instead.

After: recognized named keys are normalized to OpenTUI's canonical token (escape to ESCAPE) at the adapter boundary. Printable input such as x remains unchanged, and key modifiers are preserved.

How

• packages/simulation/src/frontend/actions.ts checks the uppercased semantic name against OpenTUI's installed KeyCodes table before pressing it.
• packages/simulation/test/actions.test.ts covers named-key normalization, modifier forwarding, and printable-key preservation through SimulationActions.execute.

Scope

The simulation protocol remains key: string; this does not add aliases or invent terminal sequences for names absent from OpenTUI's key table.

Testing

• bun test in packages/simulation: 27 passed
• bun run typecheck in packages/simulation
• Pre-push workspace typecheck: 32 packages passed