Add Renovate configuration and workflow for automated dependency updates

config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  platform: 'gitea',
+  endpoint: 'https://gitea.akshun-lab.cc/api/v1',
+  gitAuthor: 'Renovate Bot <renovate@akshun-lab.cc>',
+  username: 'renovate',
+  autodiscover: false,
+  onboardingConfig: {
+    $schema: 'https://docs.renovatebot.com/renovate-schema.json',
+    extends: ['config:recommended']
+  },
+  optimizeForDisabled: true,
+  persistRepoData: true,
+  repositories: ["aggarwalakshun/k3s"],
+}