Remove unsupported cornerRadius from schematic rect props

[rushabhcodes]

Summary

Remove cornerRadius from SchematicRectProps and the schematic rect schema so schematic rectangles only expose supported props.

What changed

• Removed cornerRadius from lib/components/schematic-rect.ts
• Added a regression test that confirms schematic rect parsing does not expose cornerRadius
• Regenerated the component type and props overview docs so the generated artifacts stay in sync

Validation

• bun scripts/generate-component-types.ts
• bun scripts/generate-manual-edits-docs.ts
• bun scripts/generate-readme-docs.ts
• bun scripts/generate-props-overview.ts
• bun test tests/schematic-rect.test.ts

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