Regenerate package interfaces with stable toolchain

[Yu-zh]

Summary

• regenerate all tracked pkg.generated.mbti files with the current stable MoonBit toolchain
• accept the generator's removal of the trailing blank line in 79 interface files

Root cause

The stable toolchain now emits generated interfaces without an extra final blank line. The stable-check workflow runs moon info and then git diff --exit-code, so the stale checked-in output caused the moon info job to fail on macOS, Ubuntu, and Windows.

This is generated-output normalization only; no public API declarations change. It also unblocks the stable checks observed on #3970.

Validation

• moon info --target wasm,wasm-gc,js,native && git diff --exit-code
• moon fmt
• moon check --warn-list +unnecessary_annotation
• moon test — 7,000 tests passed

[coveralls]

Coverage Report for CI Build 5724

Coverage remained the same at 90.458%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

---

Coverage Stats

Relevant Lines:	17754
Covered Lines:	16060
Line Coverage:	90.46%
Coverage Strength:	171797.21 hits per line

---

💛 - Coveralls