Map supported resistor footprint shorthands in resistorProps

[techmannih2]

Summary

• move resistor footprint shorthand handling into resistorProps
• map supported resistor footprint shorthands like 01005, 0402, and 2512 to res01005, res0402, and res2512
• use an explicit allowlist of footprinter-supported resistor sizes instead of a generic numeric pattern
• keep this behavior resistor-specific so shared footprint shorthands for other components are unchanged
• preserve explicit footprints like kicad:R_0402_1005Metric without rewriting them
• add tests for both shorthand mapping and passthrough behavior

[chatgpt-codex-connector]

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[imrishabh18]

I don't have the context about why this change was needed.

[tscircuitbot]

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PR Rating: ⭐⭐
Impact: Minor

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