[#34] bootstrap: Tidy up the format

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

bootstrap/types.proto

@@ -1,21 +1,33 @@
 syntax = "proto3";
+
 package bootstrap;
+
 option go_package = "github.com/nspcc-dev/neofs-api-go/bootstrap";
 option csharp_namespace = "NeoFS.API.Bootstrap";
 
+// Groups the information about the NeoFS node.
 message NodeInfo {
-    // Address is a node [multi-address](https://github.com/multiformats/multiaddr)
+    // Carries network address of the NeoFS node.
     string Address = 1;
-    // PubKey is a compressed public key representation in bytes
-    bytes PubKey = 2;
-    // Options is set of node optional information, such as storage capacity, node location, price and etc
+
+    // Carries public key of the NeoFS node in a binary format.
+    bytes PublicKey = 2;
+
+    // Carries options of the NeoFS node.
     repeated string Options = 3;
 
+    // Represents the enumeration of various states of the NeoFS node.
     enum State {
+        // Undefined state.
         Unknown = 0;
+
+        // Active state on the network.
         Online = 1;
+
+        // Network unavailable state.
         Offline = 2;
     }
 
+    // Carries state of the NeoFS node.
     State state = 4;
 }