fix(rewrite): preserve npm workspace run semantics

[YOMXXX]

Summary

• route npm run / npm run-script commands with workspace selectors through rtk npm instead of collapsing them to tool-specific wrappers
• detect -w, -w=, --workspace, --workspace=, --workspaces, and -ws before the npm -- script-args boundary
• keep ordinary specialized rewrites, including npm run tsc --noEmit and script args after --

Fixes #2098.

Tests

• cargo +1.93.0 fmt --check
• git diff --check
• cargo +1.93.0 test registry -- --nocapture (295 passed)
• CLI smokes for workspace and non-workspace npm rewrites
• cargo +1.93.0 clippy --all-targets
• cargo +1.93.0 test --all -- --skip small_grep_not_worse_than_plain (2236 passed, 8 ignored; grep integration 12 + 4 passed)