Simplify FileVisitor and dedup property hook param dependencies

[fain182]

Readability refactor with one behavioral fix:

• Remove handlePropertyHookNode: the traverser already visits hook params as Node\Param, so the dedicated handler registered every set hook param dependency twice. The existing hook param test now asserts the exact dependency list to lock this in.
• Merge the four copy-paste expression handlers (new, static call, class const fetch, instanceof) into handleClassReferenceExpression.
• Collapse leaveNode's four identical branches into one ClassLike check.
• Fold the anonymous class branch into handleClassNode and inline the addParamDependency indirection.
• Group enterNode handlers by intent (declarations, type declarations, expressions, attributes/docblocks).

No dependency detection behavior changes other than the dedup.

Claude-Session: https://claude.ai/code/session_01VUHWv3r1BJyZj4H1WzM3v9

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.22%. Comparing base (b69b679) to head (1b4195a).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #647      +/-   ##
============================================
- Coverage     98.25%   98.22%   -0.04%     
+ Complexity      704      689      -15     
============================================
  Files            87       87              
  Lines          2008     1968      -40     
============================================
- Hits           1973     1933      -40     
  Misses           35       35              

Files with missing lines	Coverage Δ
src/Analyzer/FileVisitor.php	97.45% <100.00%> (-0.52%)	⬇️

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