tools: reintroduce ts-proto build

Switch to "npm ci". This forces npm to use only dependencies explicitly
pinned in the lockfile and prevents changes.

Change-Id: I59f560bd38b1073a389024696fa4642101bb8c82

generate-protos.sh

@@ -3,7 +3,7 @@
 (
   cd tools/
   ./build.sh
-  npm install
+  npm ci
 )
 
 (
@@ -27,4 +27,14 @@ tools/bin/buf protoc \
   --go-grpc_opt=module=github.com/certusone/wormhole/bridge/pkg \
   --go-grpc_out=bridge/pkg/ proto/**/**/**
 
-mkdir -p explorer/src/proto
+mkdir -p explorer/src/proto
+
+tools/bin/buf protoc \
+  -Iproto \
+  -Ithird_party/googleapis \
+  --plugin tools/node_modules/.bin/protoc-gen-ts_proto \
+  --ts_proto_opt=esModuleInterop=true \
+  --ts_proto_opt=env=browser \
+  --ts_proto_opt=forceLong=string \
+  --ts_proto_opt=outputClientImpl=grpc-web \
+  --ts_proto_out=explorer/src/proto/ proto/**/**/**