Plan npm dependency upgrades

Classify and research npm dependency upgrade breaking changes

Safely evaluating major npm upgrades with risk tier classification and research.

• · outdated: [{name, current, update, latest, kind}]

• · upgrade-plan.md
• · tiered batch commands

• · npm outdated parser
• · semver range logic

package.json present, outdated list supplied

• · changelog not found (github/npm)
• · semver parsing ambiguous

• · patch/minor/major/pre-1.0 tier logic
• · bundler context awareness