Add krt autorouter preset

[imrishabh18]

Motivation

• Expose a new autorouter preset named krt so it can be selected in group autorouter configurations.
• Keep generated documentation and type/schema artifacts in sync with the new preset.

Description

• Add "krt" to the preset union on AutorouterConfig and to the AutorouterPreset type in lib/components/group.ts.
• Add z.enum / z.literal entries for krt in the runtime autorouterConfig schema and autorouterPreset union.
• Update generated artifacts generated/COMPONENT_TYPES.md and generated/PROPS_OVERVIEW.md to include the new preset.
• Add a unit test in tests/autorouter.test.ts asserting autorouterProp.parse("krt") returns "krt".

Testing

• Ran the generation scripts bun scripts/generate-component-types.ts, bun scripts/generate-manual-edits-docs.ts, bun scripts/generate-readme-docs.ts, and bun scripts/generate-props-overview.ts which completed successfully.
• Ran bun test tests/autorouter.test.ts and all tests passed (10 passed, 0 failed).
• Ran the typechecker with bunx tsc --noEmit which completed without errors.
• Ran biome format . / bun run format:check which reported no formatting fixes required.

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Codex Task

[tscircuitbot]

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Thank you for your contribution! 🎉

PR Rating: ⭐⭐
Impact: Minor

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