Add roadmap

ROADMAP.md

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+# Roadmap
+
+## Initial API Re-implementation
+
+- [ ] TC submit
+- [ ] \(non endpoint\) TC storage (for spawn and sync)
+- [ ] TC spawn
+- [ ] TC open
+- [ ] TC sync
+- [ ] TC images
+- [ ] Mod for switching TC endpoint (Mandatory and C#, otherwise this reimp is useless.)
+
+This will provide the same API for time capsules.
+
+## Additional features
+
+- [ ] Queue
+- [ ] Filter
+- [ ] Random Capsule Generator
+- [ ] Allow for more item slots\[1\]
+
+\[1\] - Time capsules only have 6 slots (2x3 space) for items you can place. Game *technically* can handle more than that - as overflow is dumped outside of the inventory.