Support arrays and maps in verifyEach

[leonard84]

Extends verifyEach beyond Iterable so it can also assert on object arrays and Maps.

Changes

• Arrays: verifyEach now accepts object arrays, not only Iterable.
• Maps: verifyEach accepts a Map, iterating its entries with Groovy's key/value destructuring, mirroring the Map.each idiom. The closure can use zero to three parameters:
  • no parameters: the current Map.Entry is the delegate, so key/value are referenced directly
  • one parameter: the entry
  • two parameters: the key and the value
  • an optional trailing parameter: the iteration index
• Up-front validation: the closure parameter count is now validated before iteration, throwing a clear InvalidSpecException for an unsupported count (0 to 2 for iterables/arrays) instead of failing with a less obvious error mid-iteration.

Docs & tests

• Primer section and release notes updated (including a Breaking Changes entry for the stricter parameter validation).
• New smoke tests in VerifyEachBlocks.groovy and a primer doc spec + snapshot.

🤖 Generated with Claude Code

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[codecov]

Codecov Report

❌ Patch coverage is 96.07843% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.39%. Comparing base (9cf773d) to head (514f39d).

Files with missing lines	Patch %	Lines
...k-core/src/main/java/spock/lang/Specification.java	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2398      +/-   ##
============================================
+ Coverage     82.28%   82.39%   +0.10%     
- Complexity     4884     4903      +19     
============================================
  Files           474      474              
  Lines         15267    15314      +47     
  Branches       1964     1968       +4     
============================================
+ Hits          12563    12618      +55     
+ Misses         2004     1999       -5     
+ Partials        700      697       -3     

Files with missing lines	Coverage Δ
.../java/org/spockframework/runtime/SpockRuntime.java	85.60% <100.00%> (+2.12%)	⬆️
...k-core/src/main/java/spock/lang/Specification.java	80.64% <85.71%> (+1.47%)	⬆️

... and 2 files with indirect coverage changes

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🏷️ Commit: a7ef128
▶️ Tests: 0 executed
⚪️ Checks: 7/7 completed

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