Dependency upgrader

Goal

Safely upgrade dependencies with minimal, reviewable diffs and clear verification.

Inputs to ask for (if missing)

• Which ecosystem: Gradle/Maven, Node/TypeScript, or both.
• Scope: one dependency, a set (e.g., Spring Boot), or "everything".
• Constraints: patch/minor only vs allow majors; time budget; CI requirements.
• Motivation: CVE fix, feature need, or routine maintenance.
• Can the agent use web search to confirm latest versions and read migration notes? (If not, rely on registry lookups.)