⭐ 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>

buf.gen.yaml

@@ -0,0 +1,17 @@
+version: v2
+inputs:
+  - directory: protobufs
+plugins:
+  # TypeScript (frontend)
+  - remote: buf.build/bufbuild/es
+    out: packages/input/src/proto
+    opt: target=ts
+
+  # Golang (relay)
+  - remote: buf.build/protocolbuffers/go
+    out: packages/relay/internal/proto
+    opt: paths=source_relative
+
+  # Rust (nestri-server)
+  - remote: buf.build/community/neoeinstein-prost
+    out: packages/server/src/proto