feat(declib): initial mastodon bot experiment

No default.nix yet, just for development.

Change-Id: Ib8bd0057d697fecd083d5961e635c770b7638e08
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10803
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/declib/.eslintrc.json

@@ -0,0 +1,14 @@
+{
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/strict-type-checked"],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "parserOptions": {
+    "project": true
+  },
+  "root": true,
+  "rules": {
+    "no-unused-vars": "warn",
+    "prefer-const": "warn",
+    "@typescript-eslint/no-unused-vars": "warn"
+  }
+}