Add roadmap

Author: jahooma

ROADMAP.md

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+In general, we reevaulate plans day-by-day and thus the roadmap may change at any point.
+
+As of Oct 6th, here's what we're working on:
+- Brandon is rebuilding npm-app from the ground up with a snazzy TUI and reusing the SDK instead of a custom connection to the backend
+- Charles is moving backend logic to the SDK so more code is run locally. 
+- James is building more powerful agents, especially "base2", which is the next-gen default codebuff agent. Try it with `codebuff --experimental`!