chore: install openagent opencode

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.opencode/context/core/config/paths.json

@@ -0,0 +1,7 @@
+{
+  "description": "Additional context file paths - agents load this via @ reference for dynamic pathing",
+  "paths": {
+    "local": ".opencode/context",
+    "global": "~/.config/opencode/context"
+  }
+}