Remove artificial defaults from text nodes

[tefra]

📒 Description

Due to the silly python 3.9 restrictions, it was impossible to handle empty text nodes and we had to invent artificial default values for them. It works but often we generated things like this, which is wrong and odd

     value: str = field(
         default="",
         metadata={
             "pattern": r"0x[0-9a-z]*",
        }
     )

Now we are going to follow the standard of xml binding libraries that handle this properly on the binding layer, It might add a bit more work for people but the models and the parsing will be more accurate.

🔗 What I've Done

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💬 Comments

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🛫 Checklist

• Updated docs
• Added unit-tests
• Sample tests pass
• W3C tests pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7a82d77) to head (24b5d08).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1210   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          116       116           
  Lines         9376      9381    +5     
  Branches      1439      1439           
=========================================
+ Hits          9376      9381    +5     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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