[Sonar][CRITICAL/CODE_SMELL] Refactor this method to reduce its Cognitive Complexity from 18 to the 15 allowed.

[github-actions]

Sonar issue: AZ-m77OdoUUmmpKU650S
Project: GameFrameX.Foundation
Branch: main
Severity: CRITICAL
Type: CODE_SMELL
Rule: csharpsquid:S3776
Location: GameFrameX.Foundation:GameFrameX.Foundation.Json/SpecialFloatingPointDocumentConverter.cs:83

Message:
Refactor this method to reduce its Cognitive Complexity from 18 to the 15 allowed.

[linear-code]

GFX-256