Add CLI flags for WmlComparerSettings options

[JSv4]

Summary

• Rework argument parsing in tools/redline/Program.cs to support -- flags alongside the 3 positional args
• Maintain backward compatibility with legacy 4-arg format (<author> <orig> <mod> <out>)
• Add flags for all WmlComparerSettings options: --detail-threshold, --case-insensitive, --detect-moves, --simplify-move-markup, --move-similarity-threshold, --move-minimum-word-count, --no-detect-format-changes, --no-conflate-spaces, --date-time
• Use CultureInfo.InvariantCulture for double parsing to avoid locale issues
• Error on unknown flags with helpful usage message
• Update PrintUsage() help text to document all flags
• Bump version to 1.1.0

Test plan

• dotnet build compiles without errors
• Legacy format still works: redline <author> <orig> <mod> <out>
• New format works: redline <orig> <mod> <out> --author=Name --detect-moves
• Unknown flags produce error + usage text
• Python-Redlines integration tests pass with rebuilt binaries (verified locally, 21/21 pass)