chore: add renovate

Author: nhedger

.github/renovate.json

@@ -0,0 +1,16 @@
+{
+	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
+	"timezone": "Europe/Zurich",
+	"schedule": ["before 9am on monday"],
+	"extends": [
+		"config:best-practices",
+		":semanticCommitTypeAll(chore)",
+		"customManagers:biomeVersions"
+	],
+	"rangeStrategy": "pin",
+	"lockFileMaintenance": {
+		"enabled": false
+	},
+	"assignees": ["@biomejs/maintainers", "@biomejs/core-contributors"],
+	"ignoreScripts": true
+}