app navigator, tab navigator, session screen, minimal config on tabs & container

screens/session.tsx

@@ -0,0 +1,15 @@
+import React from 'react'
+import { View, StyleSheet } from "react-native";
+import BarGraph from '../component/charts/bar-graph/bar-graph';
+import { graph_data_two_measures } from '../mock/charts/mock-data';
+
+// Session Mock - can be used for session summary screen using a query handler component
+// BarGraph component using mocked data currently
+export default function SessionScreen() {
+  return (
+
+    <View style={StyleSheet.absoluteFill}>
+      <BarGraph data={graph_data_two_measures} />
+    </View>
+  )
+}