chore: Reorganize examples and interop crates (#180)

* chore: Reorganize examples and interop crates

* fix interop tests

examples/src/routeguide/data.rs

@@ -0,0 +1,34 @@
+use serde::Deserialize;
+use std::fs::File;
+
+#[derive(Debug, Deserialize)]
+struct Feature {
+    location: Location,
+    name: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct Location {
+    latitude: i32,
+    longitude: i32,
+}
+
+#[allow(dead_code)]
+pub fn load() -> Vec<crate::routeguide::Feature> {
+    let file =
+        File::open("tonic-examples/data/route_guide_db.json").expect("failed to open data file");
+
+    let decoded: Vec<Feature> =
+        serde_json::from_reader(&file).expect("failed to deserialize features");
+
+    decoded
+        .into_iter()
+        .map(|feature| crate::routeguide::Feature {
+            name: feature.name,
+            location: Some(crate::routeguide::Point {
+                longitude: feature.location.longitude,
+                latitude: feature.location.latitude,
+            }),
+        })
+        .collect()
+}