refactor: rename registerCallMethod* to registerOnSend* for consistency

[takaokouji]

Summary

This PR refactors the Ruby-to-blocks converter infrastructure by renaming method registration functions for better consistency and clarity.

Changes Made

• Core Method Renamings:

  • registerCallMethod → registerOnSend
  • registerCallMethodWithBlock → registerOnSendWithBlock
  • registerCallMyBlock → registerOnSendMyBlock

• Files Updated:

  • Updated core implementation in index.js
  • Refactored all core converters: Motion, Looks, Sound, Event, Control, Sensing, Operators, Variables, MyBlocks
  • Updated all extension converters: MicroBit, Video, Music, Pen, EV3, Boost, etc. (13+ extension files)
  • Total: 23 files modified with 278 insertions/deletions

Benefits

• Improved Naming Convention: Method names now better reflect their purpose in handling Ruby send operations
• Enhanced Code Maintainability: More descriptive and intuitive method names for developers
• Consistent API Design: Unified naming pattern across the entire converter infrastructure
• Zero Breaking Changes: All existing functionality preserved

Testing

• ✅ All converter unit tests pass
• ✅ MyBlocks converter tests specifically verified
• ✅ No functional changes, only method name updates

Implementation Details

The refactoring systematically updated:

1. Core method definitions in the RubyToBlocksConverter class
2. All method calls across converter implementations
3. Maintained backward compatibility throughout
4. Used batch operations for extension converters to ensure consistency

This improvement addresses the need for clearer, more consistent naming in the Ruby-to-blocks converter infrastructure, making the codebase more maintainable and developer-friendly.

Closes #402

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