fix: add claudecode to valid targets in parser validation

[ise]

Summary

Fix validation error when importing from CLAUDE.md by adding claudecode to valid targets.

Problem

• When using the import command to import from CLAUDE.md, the targets field is set to ["claudecode"]
• However, src/core/parser.ts validation only allows ["copilot", "cursor", "cline", "claude", "roo", "*"]
• This causes a validation error: Invalid target "claudecode" when running rulesync validate

Solution

• Added claudecode to the validTargets array in src/core/parser.ts
• Since claude is already being used as a target in existing configurations, we preserve both claude and claudecode for backward compatibility
• Added comprehensive tests to ensure both single and mixed target configurations work properly

Changes

• ✅ Updated validTargets array to include claudecode
• ✅ Added test cases for claudecode target validation
• ✅ Added test cases for mixed targets including claudecode
• ✅ All existing tests pass (159/159)

Testing

pnpm test  # All tests pass

The fix resolves the validation error while maintaining backward compatibility with existing claude target configurations.

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Thank you for creating such an amazing tool! 🚀
Please review when you have a chance.

[cm-dyoshikawa]

Good catch!

I will convert claude keyword to claudecode and delete all claude in this tool's specification in the near future.

Thank you so much.

[cm-dyoshikawa]

I will merged it after reviewing soon.