chore(kv): impl conversion traits for bindings

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

Author: rvolosatovs

crates/wasi-keyvalue/src/lib.rs

@@ -2,3 +2,41 @@ wit_bindgen_wrpc::generate!({
     world: "proxy",
     generate_all,
 });
+
+// TODO: Generate a single type for both imports and exports
+
+impl From<wasi::keyvalue::store::Error> for exports::wasi::keyvalue::store::Error {
+    fn from(v: wasi::keyvalue::store::Error) -> Self {
+        match v {
+            wasi::keyvalue::store::Error::NoSuchStore => Self::NoSuchStore,
+            wasi::keyvalue::store::Error::AccessDenied => Self::AccessDenied,
+            wasi::keyvalue::store::Error::Other(err) => Self::Other(err),
+        }
+    }
+}
+
+impl From<exports::wasi::keyvalue::store::Error> for wasi::keyvalue::store::Error {
+    fn from(v: exports::wasi::keyvalue::store::Error) -> Self {
+        match v {
+            exports::wasi::keyvalue::store::Error::NoSuchStore => Self::NoSuchStore,
+            exports::wasi::keyvalue::store::Error::AccessDenied => Self::AccessDenied,
+            exports::wasi::keyvalue::store::Error::Other(err) => Self::Other(err),
+        }
+    }
+}
+
+impl From<wasi::keyvalue::store::KeyResponse> for exports::wasi::keyvalue::store::KeyResponse {
+    fn from(
+        wasi::keyvalue::store::KeyResponse { keys, cursor }: wasi::keyvalue::store::KeyResponse,
+    ) -> Self {
+        Self { keys, cursor }
+    }
+}
+
+impl From<exports::wasi::keyvalue::store::KeyResponse> for wasi::keyvalue::store::KeyResponse {
+    fn from(
+        exports::wasi::keyvalue::store::KeyResponse { keys, cursor }: exports::wasi::keyvalue::store::KeyResponse,
+    ) -> Self {
+        Self { keys, cursor }
+    }
+}