⭐ 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/buf.yaml

@@ -0,0 +1,7 @@
+version: v2
+breaking:
+  use:
+    - FILE
+lint:
+  use:
+    - STANDARD

protobufs/latency_tracker.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+import "google/protobuf/timestamp.proto";
+
+option go_package = "relay/internal/proto";
+
+package proto;
+
+message ProtoTimestampEntry {
+  string stage = 1;
+  google.protobuf.Timestamp time = 2;
+};
+
+message ProtoLatencyTracker {
+    string sequence_id = 1;
+    repeated ProtoTimestampEntry timestamps = 2;
+}

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;
+}

protobufs/types.proto

@@ -0,0 +1,63 @@
+syntax = "proto3";
+
+option go_package = "relay/internal/proto";
+
+package proto;
+
+// MouseMove message
+message ProtoMouseMove {
+  string type = 1; // Fixed value "MouseMove"
+  int32 x = 2;
+  int32 y = 3;
+}
+
+// MouseMoveAbs message
+message ProtoMouseMoveAbs {
+  string type = 1; // Fixed value "MouseMoveAbs"
+  int32 x = 2;
+  int32 y = 3;
+}
+
+// MouseWheel message
+message ProtoMouseWheel {
+  string type = 1; // Fixed value "MouseWheel"
+  int32 x = 2;
+  int32 y = 3;
+}
+
+// MouseKeyDown message
+message ProtoMouseKeyDown {
+  string type = 1; // Fixed value "MouseKeyDown"
+  int32 key = 2;
+}
+
+// MouseKeyUp message
+message ProtoMouseKeyUp {
+  string type = 1; // Fixed value "MouseKeyUp"
+  int32 key = 2;
+}
+
+// KeyDown message
+message ProtoKeyDown {
+  string type = 1; // Fixed value "KeyDown"
+  int32 key = 2;
+}
+
+// KeyUp message
+message ProtoKeyUp {
+  string type = 1; // Fixed value "KeyUp"
+  int32 key = 2;
+}
+
+// Union of all Input types
+message ProtoInput {
+  oneof input_type {
+    ProtoMouseMove mouse_move = 1;
+    ProtoMouseMoveAbs mouse_move_abs = 2;
+    ProtoMouseWheel mouse_wheel = 3;
+    ProtoMouseKeyDown mouse_key_down = 4;
+    ProtoMouseKeyUp mouse_key_up = 5;
+    ProtoKeyDown key_down = 6;
+    ProtoKeyUp key_up = 7;
+  }
+}