docs: mention about the mirrored state

Author: antfu

README.md

@@ -1,12 +1,17 @@
 # [sli.dev](https://sli.dev)
 
-Documentation for [Slidev](https://github.com/slidevjs/slidev)
+> [!IMPORTANT]
+> This repository is a mirror of the `docs/` directory in [slidevjs/slidev](https://github.com/slidevjs/slidev/tree/main/docs). Mainly for other translations repositories to sync.
+>
+> **‼️ Please DO NOT submit pull requests here ‼️**. Instead, send them to the [main repository](https://github.com/slidevjs/slidev), and they will be synced here automatically.
+
+Mirrored documentation site for [Slidev](https://github.com/slidevjs/slidev)
 
 ## Translations
 
 |                | Repo                                           |                             Site | Maintainers                                                           |
 | -------------- | ---------------------------------------------- | -------------------------------: | --------------------------------------------------------------------- |
-| English        | [docs](https://github.com/slidevjs/docs)       |       [sli.dev](https://sli.dev) | [@antfu](https://github.com/antfu)                                    |
+| English        | [docs](https://github.com/slidevjs/slidev/tree/main/docs)       |       [sli.dev](https://sli.dev) | [@antfu](https://github.com/antfu)                                    |
 | 简体中文       | [docs-cn](https://github.com/slidevjs/docs-cn) | [cn.sli.dev](https://cn.sli.dev) | [@QC-L](https://github.com/QC-L) [@Ivocin](https://github.com/Ivocin) |
 | Français       | [docs-fr](https://github.com/slidevjs/docs-fr) | [fr.sli.dev](https://fr.sli.dev) | [@ArthurDanjou](https://github.com/ArthurDanjou)                      |
 | Español        | [docs-es](https://github.com/slidevjs/docs-es) | [es.sli.dev](https://es.sli.dev) | [@owlnai](https://github.com/owlnai)                                  |

sync.js

@@ -0,0 +1,28 @@
+/**
+ * Sync the changes from the main Slidev repository to this repo
+ * https://stackoverflow.com/a/63745988
+ *
+ * Use `bun sync.js` to run this script
+ */
+/* eslint-disable no-console */
+import process from 'node:process'
+import { $ } from 'bun'
+
+await $`git remote rm slidev`
+await $`git remote add slidev https://github.com/slidevjs/slidev`
+await $`git fetch slidev main`
+
+console.log('Timestamp of last commit:')
+const { stdout: timestamp } = await $`git log -1 --format="%at" main`
+console.log('Commits since last time:')
+const { stdout: hashes } = await $`git log --since="${+(timestamp.toString()) + 1}" slidev/main --format="%H"`
+
+const firstHash = hashes.toString().trim().split('\n').at(-1)
+if (!firstHash) {
+  console.log('No changes to sync')
+  process.exit(0)
+}
+
+const command = `git format-patch -k --stdout ${firstHash}...slidev/main --remove-empty -- docs | git am -3 -k --empty=drop`
+console.log('Running command:', command)
+await $(command)