feat: support 0x format in float

[louiscaron]

an official autosar tool is generating float values with this format.

[DanielT]

Thanks for the fix.
I will be happy to merge this, but at the moment the build is failing - it looks like one closing brace got lost.

[louiscaron]

sorry about this, i made a mistake when applying the patch... i fixed the error now.

[codecov]

Codecov Report

Attention: Patch coverage is 64.70588% with 6 lines in your changes missing coverage. Please review.

Project coverage is 90.79%. Comparing base (fb99932) to head (e026b13).

Files	Patch %	Lines
a2lfile/src/parser.rs	64.70%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   90.80%   90.79%   -0.02%     
==========================================
  Files          27       27              
  Lines       37334    37344      +10     
==========================================
+ Hits        33901    33906       +5     
- Misses       3433     3438       +5     

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