feat(native): expose unified edit module with native ops
Adds applyEdits, applyWorkspaceEdit, replaceSymbol, insertAroundSymbol,
and watchTree to @singularity-forge/native via the new ./edit subpath.
- applyEdits / applyWorkspaceEdit: LSP-shaped TextEdit arrays applied via
byte-level splice + atomic rename, two-phase commit across files.
- replaceSymbol / insertAroundSymbol: tree-sitter symbol resolution via
forge-ast, TS/JS/TSX support; v1 replaces whole declaration.
- watchTree: notify-rs recursive watcher with native globset ignore + JS
EventEmitter wrapper (drops chokidar dep).
Rust impl in rust-engine/crates/engine/src/{edit,symbol,watch}.rs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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