feat(SIP-39): Websocket sidecar app (#11498)

* WIP node.js websocket app

* Load testing

* Multi-stream publish with blocking reads

* Use JWT for auth and channel ID

* Update ws jwt cookie name

* Typescript

* Frontend WebSocket transport support

* ws server ping/pong and GC logic

* ws server unit tests

* GC interval config, debug logging

* Cleanup JWT cookie logic

* Refactor asyncEvents.ts to support non-Redux use cases

* Update tests for refactored asyncEvents

* Add eslint, write READMEs, reorg files

* CI workflow

* Moar Apache license headers

* pylint found something

* adjust GH actions workflow

* Improve documentation & comments

* Prettier

* Add configurable logging via Winston

* Add SSL support for Redis connections

* Fix incompatible logger statements

* Apply suggestions from code review

Co-authored-by: David Aaron Suddjian <1858430+suddjian@users.noreply.github.com>

* rename streamPrefix config

Co-authored-by: David Aaron Suddjian <1858430+suddjian@users.noreply.github.com>

superset-websocket/package.json

@@ -0,0 +1,41 @@
+{
+  "name": "superset-websocket",
+  "version": "0.0.1",
+  "description": "Websocket sidecar application for Superset",
+  "main": "index.js",
+  "scripts": {
+    "start": "node dist/index.js start",
+    "test": "NODE_ENV=test jest -i spec",
+    "type": "tsc --noEmit",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx && npm run type",
+    "dev-server": "ts-node src/index.ts start",
+    "build": "tsc",
+    "prettier-check": "prettier --check .",
+    "format": "prettier --write ."
+  },
+  "license": "Apache-2.0",
+  "dependencies": {
+    "cookie": "^0.4.1",
+    "ioredis": "^4.16.1",
+    "jsonwebtoken": "^8.5.1",
+    "uuid": "^8.3.2",
+    "winston": "^3.3.3",
+    "ws": "^7.4.2"
+  },
+  "devDependencies": {
+    "@types/ioredis": "^4.22.0",
+    "@types/jest": "^26.0.20",
+    "@types/node": "^14.14.22",
+    "@types/uuid": "^8.3.0",
+    "@types/ws": "^7.4.0",
+    "@typescript-eslint/eslint-plugin": "^4.19.0",
+    "@typescript-eslint/parser": "^4.19.0",
+    "eslint": "^7.22.0",
+    "eslint-config-prettier": "^8.1.0",
+    "jest": "^26.6.3",
+    "prettier": "2.2.1",
+    "ts-jest": "^26.5.3",
+    "ts-node": "^9.1.1",
+    "typescript": "^4.2.3"
+  }
+}