Fixed point formatter handling 0 values

[lealobanov]

Description

• Additional handling for zero values to FixedPointFormatter
• Add test cases mimicking failing transaction structure similar to https://www.flowscan.io/tx/9ccfada6a75ee2b9fe91439af157f91e9e2a193c9725a99244d243e8697283fb?tab=script

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels