build: add oxlint

package.json

@@ -4,7 +4,9 @@
   "private": true,
   "description": "LSP tools for pi: hover, definition, references, completions, symbols, diagnostics.",
   "pi": {
-    "extensions": ["./index.ts"]
+    "extensions": [
+      "./index.ts"
+    ]
   },
   "type": "module",
   "bin": {
@@ -12,7 +14,8 @@
   },
   "scripts": {
     "lsp": "tsx ./cli.ts",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "lint": "oxlint . --ignore-pattern=.direnv/**"
   },
   "dependencies": {
     "vscode-jsonrpc": "^8.2.1",
@@ -20,6 +23,7 @@
   },
   "devDependencies": {
     "@types/node": "^22.10.0",
+    "oxlint": "^1.62.0",
     "tsx": "^4.19.2",
     "typescript": "^6.0.3"
   }