Apply code style, add psalm

[roxblnfk]

🔍 What was changed

• Applied Spiral style
• Added psalm in CI

[codecov]

Codecov Report

Attention: Patch coverage is 96.55172% with 4 lines in your changes missing coverage. Please review.

Project coverage is 95.26%. Comparing base (40eec53) to head (1532590).
Report is 4 commits behind head on 4.x.

Files with missing lines	Patch %	Lines
src/Migrator.php	88.23%	2 Missing ⚠️
src/Operation/Column/Drop.php	0.00%	1 Missing ⚠️
src/Operation/Traits/OptionsTrait.php	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                4.x      #60      +/-   ##
============================================
- Coverage     95.36%   95.26%   -0.10%     
+ Complexity      246      243       -3     
============================================
  Files            30       30              
  Lines           776      781       +5     
============================================
+ Hits            740      744       +4     
- Misses           36       37       +1     

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