fix: pin reedline to 0.47.0

[amitksingh1490]

Summary

Pin reedline to 0.47.0 to mitigate a suspected terminal segfault introduced after the 0.48.0 dependency update.

Context

The v2.13.0 release included a reedline update from 0.47.0 to 0.48.0. The segfault appears related to terminal interaction, and Forge's interactive prompt is built directly on reedline. This PR temporarily pins reedline to the previous known version while the 0.48.0 regression is investigated.

Changes

• Pin workspace reedline dependency to exactly 0.47.0
• Downgrade Cargo.lock from reedline 0.48.0 to 0.47.0

Testing

cargo check -p forge_main
cargo test -p forge_main highlighter::tests
cargo test -p forge_main prompt::tests

Notes

This is intended as a conservative mitigation. Once the upstream reedline 0.48.0 issue is isolated or fixed, the dependency can be unpinned and upgraded again.