Create roadmap for GooseStrike project

Added a roadmap outlining near, mid, and long-term goals, as well as explicit non-goals for the GooseStrike project.

ROADMAP.md

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+# GooseStrike — Roadmap (Intent-Level)
+
+This roadmap describes **direction**, not commitments.
+
+## Near Term
+- Improve intent → plan translation
+- Strengthen approval and safety controls
+- Better visualization of execution impact
+- Tighter linkage between tasks and findings
+
+## Mid Term
+- Multi-agent planning assistance
+- Cross-tool correlation before execution
+- Pluggable execution runners
+- Stronger audit and replay capability
+
+## Long Term
+- Scenario-based planning
+- Distributed execution environments
+- Federated orchestration across platforms
+
+---
+
+## Explicit Non-Goals
+- Becoming a SIEM
+- Replacing analyst decision-making
+- Autonomous unsupervised execution