Implemented FLOW-002 boolean and alternative behavior.

RESULT: SUCCESS

FILES CHANGED:
- jq_interpreter/evaluator.py
- tests/test_core_004_truthiness_comparison.py
- tests/test_flow_002_boolean_alternative.py

SUMMARY:
- Fixed `any(condition)`/`all(condition)` element-wise semantics.
- Verified `and`, `or`, `not`, `//`, and `//=` behavior.
- Tests: 85 passed.
- Conformance: 78 passed, 0 failed, 0 errored, 7 skipped.

BLOCKERS:
- None