Fix Go type inference for 0.0 as FloatType

[Delaksan-Sritharan]

Description

Summary

Fixes the Go type inference bug where the numeric literal 0.0 was being inferred as an integer instead of a float.

What changed

• Updated the inference logic to preserve JSON numeric literals during conversion.
• Ensured values such as 0.0 are classified as FloatType.
• Added a regression test to cover the 0.0 case and prevent future regressions.

Why

This addresses issue #142: “0.0 is not being inferred as FloatType”.

Validation

• Added regression coverage for numeric literal inference
• Verified the relevant Go package tests pass successfully

[gemini-code-assist]

Caution

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[CLAassistant]

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