chore: replace renovate with dependabot

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - package-ecosystem: "pnpm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10

renovate.json

@@ -1,22 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["config:base", "group:allNonMajor", "group:codemirror"],
-  "lockFileMaintenance": {
-    "enabled": true,
-    "automerge": true
-  },
-  "packageRules": [
-    {
-      "matchDepTypes": ["devDependencies"],
-      "matchPackagePatterns": ["lint", "prettier"],
-      "automerge": true
-    },
-    {
-      "matchUpdateTypes": ["patch"],
-      "matchCurrentVersion": "!/^0/",
-      "automerge": true
-    }
-  ],
-  "automergeSchedule": ["before 2am"],
-  "schedule": ["before 2am"]
-}