Fix MoonBit 0.1.3 compatibility and warnings

[tiye]

Summary

• update quaternion operator trait impls to the current MoonBit API
• keep op_* compatibility helpers for downstream packages
• clean remaining MoonBit warnings and bump package version to 0.1.3

Validation

• moon check --target js
• moon test
• moon fmt
• moon info
• moon publish --dry-run

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 32a7cfc4-7e13-4a15-b9ca-d96743b43eb4

📥 Commits

Reviewing files that changed from the base of the PR and between c4ce0b5 and 40114fd.

📒 Files selected for processing (6)

• moon.mod.json
• src/lib/euler.mbt
• src/lib/moon.pkg
• src/lib/moon.pkg.json
• src/lib/quaternion.mbt
• src/lib/quaternion_test.mbt

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/moonbit-0.1.3-compat

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[Copilot]

Pull request overview

Updates the quaternion library to be compatible with MoonBit 0.1.3 by aligning operator trait implementations with the updated API, keeping op_* helper methods for downstream compatibility, and addressing warnings / packaging metadata.

Changes:

• Migrate operator trait impls to the newer method names (add/sub/mul/div) while retaining op_add/op_sub/op_mul/op_div helper methods.
• Replace deprecated numeric conversions / bit reinterpret helpers with the current Float::from_* / Float::reinterpret_from_int APIs and adjust tests accordingly.
• Switch package config to moon.pkg import form (and bump module version to 0.1.3).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/lib/quaternion.mbt	Updates Float conversion APIs, operator trait method names, retains op_* compatibility helpers, and updates docs code fences to nocheck.
src/lib/quaternion_test.mbt	Adjusts tests to new Float helpers and updated Result/try patterns.
src/lib/moon.pkg.json	Removes the empty legacy package config file.
src/lib/moon.pkg	Adds package-level import for moonbitlang/core/math used by euler.mbt.
src/lib/euler.mbt	Updates cos/sin conversions to the new Float::from_double API.
moon.mod.json	Bumps package version from 0.1.2 to 0.1.3.

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