feat: Comprehensive interpreter improvements for control flow and operators

[fglock]

Summary

This PR consolidates multiple interpreter enhancements for control flow and operators, improving compatibility with Perl semantics.

Features Added

• ✅ Negated regex match (!~) operator support
• ✅ last/next/redo operators with label support
• ✅ Proper do-while loop handling (prevent last/next/redo)
• ✅ ScalarSpecialVariable handling using addToScalar

Fixes

• ✅ Use STRING bitwise operators by default instead of INTEGER operators
• ✅ Evaluate while/if conditions in SCALAR context (was LIST context)
• ✅ Fix context propagation for logical operators (&&, ||, //)
• ✅ Fix context propagation for regex matches in LIST context

Implementation Details

• BytecodeCompiler: Added BITWISE_AND_STR, BITWISE_OR_STR, BITWISE_XOR_STR opcodes
• BytecodeCompiler: Added LAST, NEXT, REDO, LAST_LABEL, NEXT_LABEL, REDO_LABEL opcodes
• BytecodeCompiler: Added REGEX_NOT_MATCH opcode for !~ operator
• BytecodeCompiler: Improved control flow handling for loops
• BytecodeInterpreter: Implemented loop control operators with label resolution
• InterpretedCode: Added pushLoopLabels/popLoopLabels for label tracking
• Opcodes: Extended with new operation codes for control flow and operators

Files Modified

• BytecodeCompiler.java: +353/-53 lines
• BytecodeInterpreter.java: +48/-8 lines
• InterpretedCode.java: +19/-0 lines
• Opcodes.java: +25/-3 lines

Total: 4 files changed, 381 insertions(+), 64 deletions(-)

Test Results

• ✅ make passes (unit tests)
• ✅ re/regexp.t: 1786/2210 passing (80.8%)

Test Plan

• Run make to verify build and unit tests
• Run perl dev/tools/perl_test_runner.pl perl5_t/t/re/regexp.t
• Merge after approval and CI passes

🤖 Generated with Claude Code