Add auto PR generation (#48)

* Remap 1.21.6 to Mojang mappings

* start working on automation

* update newVersion script to use manifest

* update scripts

* update doc

* add dispatchable bump workflow

* update workflow env

* update workflows

tools/newVersion.js

@@ -0,0 +1,38 @@
+const fs = require('fs')
+const { join } = require('path')
+
+const manifest = require('../versions.json')
+
+const oldVersion = manifest.at(-1)
+const oldDir = join(__dirname, '../mc', oldVersion)
+
+function bump (newVersion) {
+  const newDir = join(__dirname, '../mc', newVersion)
+
+  if (fs.existsSync(newDir)) {
+    console.warn(`New version directory already exists: ${newDir}`)
+    process.exit(0)
+  }
+
+  fs.cpSync(oldDir, newDir, { recursive: true })
+
+  // update the build.gradle file in the new mc version directory to replace the old version with the new version
+  const buildGradlePath = join(__dirname, '../mc', newVersion, 'build.gradle')
+  let buildGradleContent = fs.readFileSync(buildGradlePath, 'utf8')
+  buildGradleContent = buildGradleContent.replace(new RegExp(oldVersion, 'g'), newVersion)
+  fs.writeFileSync(buildGradlePath, buildGradleContent)
+
+  // Now update the versions.json file
+  manifest.push(newVersion)
+  fs.writeFileSync(join(__dirname, '../versions.json'), JSON.stringify(manifest, null, 2))
+}
+
+module.exports = bump
+if (require.main === module) {
+  const [newVersion] = process.argv.slice(2)
+  if (!newVersion) {
+    console.error('Usage: node newVersion.js <newVersion>')
+    process.exit(1)
+  }
+  bump(newVersion)
+}