feat(background): add other in-game backgrouds (1/2)

Co-authored-by: yueqiaocertik <yueqiaocertik@users.noreply.github.com>

libs/append.js

@@ -0,0 +1,18 @@
+import path from 'path'
+import { appendSync, readSync } from './file.js'
+
+export function appendReadme(config, operatorName, rootDir) {
+    const operatorConfig = config.operators[operatorName]
+    const projectJson = JSON.parse(readSync(path.join(rootDir, config.folder.operator, operatorName, 'project.json')))
+    appendSync(
+        `\n| ${operatorConfig.title.split(' - ')[0].split('Arknights: ')[1]} | [Link](https://arknights.halyul.dev/${operatorConfig.link}/) | [Link](https://steamcommunity.com/sharedfiles/filedetails/?id=${projectJson.workshopid}) |`,
+        path.join(rootDir, 'README.md')
+    )
+}
+
+export function appendMainConfig(operatorName, rootDir) {
+    appendSync(
+        `\n  ${operatorName}: !include config/${operatorName}.yaml`,
+        path.join(rootDir, 'config.yaml')
+    )
+}