Add support for jobs & queueables, migrations

- Create migration directives & migrators
- Modify Cache classes to support array manipulation
- Create Redis unit and RedisCache implementation
- Create Queueable base class and Queue class that uses Cache backend

package.json

@@ -12,6 +12,7 @@
     "@types/bcrypt": "^5.0.0",
     "@types/busboy": "^0.2.3",
     "@types/cli-table": "^0.3.0",
+    "@types/ioredis": "^4.26.6",
     "@types/mime-types": "^2.1.0",
     "@types/mkdirp": "^1.0.1",
     "@types/negotiator": "^0.6.1",
@@ -27,6 +28,7 @@
     "cli-table": "^0.3.6",
     "colors": "^1.4.0",
     "dotenv": "^8.2.0",
+    "ioredis": "^4.27.6",
     "mime-types": "^2.1.31",
     "mkdirp": "^1.0.4",
     "negotiator": "^0.6.2",