Replace deprecated data-binary-ieee754 package with GHC.Float

[Copilot]

Summary

This PR replaces the deprecated data-binary-ieee754 package with equivalent functions from GHC.Float (part of the base package). The data-binary-ieee754 package hasn't been updated in over 10 years and is marked as deprecated.

Changes

The following conversions were made:

• Data.Binary.IEEE754.floatToWord → GHC.Float.castFloatToWord32
• Data.Binary.IEEE754.doubleToWord → GHC.Float.castDoubleToWord64
• Data.Binary.IEEE754.wordToFloat → GHC.Float.castWord32ToFloat
• Data.Binary.IEEE754.wordToDouble → GHC.Float.castWord64ToDouble
• Data.Binary.IEEE754.getFloat32le → custom getFloat32le using castWord32ToFloat <$> getWord32le
• Data.Binary.IEEE754.getFloat64le → custom getFloat64le using castWord64ToDouble <$> getWord64le

Testing

All existing tests pass (90/90), including:

• Float and Double encoding/decoding for single values
• Float and Double encoding/decoding for packed lists
• Float and Double encoding/decoding for repeated fields
• All integration tests

The GHC.Float functions have been available since GHC 7.8 and are part of the standard base package, making this a safe and future-proof replacement.

Fixes #71

Original prompt

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This section details on the original issue you should resolve

<issue_title>Replace deprecated data-binary-ieee754 package</issue_title>
<issue_description>Please consider replacing the data-binary-ieee754 package which is deprecated and haven't seen an update in more than 10 years.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #40

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