feat: add migration service to import from envkey

backend/package.json

@@ -134,6 +134,7 @@
     "@slack/oauth": "^3.0.1",
     "@slack/web-api": "^7.3.4",
     "@team-plain/typescript-sdk": "^4.6.1",
+    "@types/sjcl": "^1.0.34",
     "@ucast/mongo2js": "^1.3.4",
     "ajv": "^8.12.0",
     "argon2": "^0.31.2",
@@ -182,6 +183,7 @@
     "safe-regex": "^2.1.1",
     "scim-patch": "^0.8.3",
     "scim2-parse-filter": "^0.2.10",
+    "sjcl": "^1.0.8",
     "smee-client": "^2.0.0",
     "tedious": "^18.2.1",
     "tweetnacl": "^1.0.3",