[sebenns]

Summary

• Standardize boolean signal input declarations without changing their defaults.
• Derive applicable size aliases from ComponentSize.
• Move InputGroupOrientation into its interfaces file and retain its public barrel export.
• Remove redundant default descriptions and update coding conventions.

Verification

• Lint, formatting and strict type checks passed.
• Library and documentation-tool tests passed.
• The focused InputGroup regression test passed after export cleanup.
• Package validation and isolated consumer builds passed.