Fixes implements and extends rules behaviour

[micheleorselli]

This should provide a fix for #393

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 94.75%. Comparing base (fd47236) to head (d864a78).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Expression/ForClasses/NotImplement.php	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #456      +/-   ##
============================================
- Coverage     94.79%   94.75%   -0.04%     
- Complexity      606      611       +5     
============================================
  Files            69       69              
  Lines          1614     1621       +7     
============================================
+ Hits           1530     1536       +6     
- Misses           84       85       +1     

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[AlessandroMinoccheri]

Do we need to specify something more in the documentation @micheleorselli ?

[micheleorselli]

Do we need to specify something more in the documentation @micheleorselli ?

uhm, not really sure, we can probably specify the difference between implements and extends maybe?