🚨 Linting: add biome

Author: Christopher-Hayes

biome.json

@@ -0,0 +1,65 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.1.2/schema.json",
+  "vcs": { "enabled": true, "clientKind": "git", "useIgnoreFile": true },
+  "files": { "ignoreUnknown": false },
+  "formatter": { "enabled": true, "indentStyle": "space" },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": false,
+      "complexity": { "noUselessTypeConstraint": "error" },
+      "correctness": { "noUnusedVariables": "error" },
+      "style": {
+        "noCommonJs": "error",
+        "noNamespace": "error",
+        "useArrayLiterals": "error",
+        "useAsConstAssertion": "error"
+      },
+      "suspicious": {
+        "noExplicitAny": "error",
+        "noExtraNonNullAssertion": "error",
+        "noMisleadingInstantiator": "error",
+        "noUnsafeDeclarationMerging": "error",
+        "useNamespaceKeyword": "error"
+      }
+    }
+  },
+  "javascript": { "formatter": { "quoteStyle": "double" } },
+  "overrides": [
+    {
+      "includes": ["*.ts", "*.tsx", "*.mts", "*.cts"],
+      "linter": {
+        "rules": {
+          "complexity": { "noArguments": "error" },
+          "correctness": {
+            "noConstAssign": "off",
+            "noGlobalObjectCalls": "off",
+            "noInvalidBuiltinInstantiation": "off",
+            "noInvalidConstructorSuper": "off",
+            "noSetterReturn": "off",
+            "noUndeclaredVariables": "off",
+            "noUnreachable": "off",
+            "noUnreachableSuper": "off"
+          },
+          "style": { "useConst": "error" },
+          "suspicious": {
+            "noClassAssign": "off",
+            "noDuplicateClassMembers": "off",
+            "noDuplicateObjectKeys": "off",
+            "noDuplicateParameters": "off",
+            "noFunctionAssign": "off",
+            "noImportAssign": "off",
+            "noRedeclare": "off",
+            "noUnsafeNegation": "off",
+            "noVar": "error",
+            "useGetterReturn": "off"
+          }
+        }
+      }
+    }
+  ],
+  "assist": {
+    "enabled": true,
+    "actions": { "source": { "organizeImports": "on" } }
+  }
+}

package-lock.json

@@ -20,6 +20,7 @@
     "x-forwarded-fetch": "^0.2.0"
   },
   "devDependencies": {
+    "@biomejs/biome": "2.1.2",
     "@types/node": "^20",
     "@types/react": "^18",
     "@types/react-dom": "^18",

package.json

@@ -17,6 +17,7 @@ const documentLoader = await context.getDocumentLoader({
 
 // Save locally for testing (and to avoid spamming servers)
 // "Note" is ActivityPub speak for "Mastodon Post"
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 async function saveNoteLocally(post: Note | null, author: Actor | null) {
   fs.writeFileSync(
     "post.json",