build: esbuild instead of tsc

*Before*
npm notice package size: 756.7 kB
npm notice unpacked size: 7.9 MB
npm notice total files: 618

*After*
npm notice package size: 244.6 kB
npm notice unpacked size: 3.0 MB
npm notice total files: 207

Author: turadg

packages/cosmic-proto/package.json

@@ -148,7 +148,7 @@
     "!CHANGELOG.md"
   ],
   "scripts": {
-    "build": "tsc --project tsconfig.build.json && scripts/minify.cjs",
+    "build": "esbuild --platform=neutral --format=esm --outdir=dist src/*.ts src/codegen/**/*.ts",
     "clean": "rimraf dist",
     "codegen": "./update-protos.sh && scripts/codegen.cjs",
     "prepare": "npm run build",