⭐ feat: protobuf input messaging (#165)

Replace json protocol by protobuf
generate protobuf files with `bun buf generate` or just `buf generate`

- [x]  Implement all datatypes with proto files

- [x] Map to ts types or use the generated proto types directly with:
   - [x] web frontend
   - [x] relay
   - [x] runner

- [ ] final performance test (to be done when CI builds new images)

---------

Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>

protobufs/messages.proto

@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+option go_package = "relay/internal/proto";
+
+import "types.proto";
+import "latency_tracker.proto";
+
+package proto;
+
+message ProtoMessageBase {
+  string payload_type = 1;
+  ProtoLatencyTracker latency = 2;
+}
+
+message ProtoMessageInput {
+    ProtoMessageBase message_base = 1;
+    ProtoInput data = 2;
+}