feat: Add the merge to the file. (#2643)

* feat: Add the merge to the file.

* chore: Fix the early escape

sdk/lib/util/fileHelper.ts

@@ -1,6 +1,7 @@
 import * as matches from "ts-matches"
 import * as YAML from "yaml"
 import * as TOML from "@iarna/toml"
+import _ from "lodash"
 import * as T from "../types"
 import * as fs from "fs"
 
@@ -82,6 +83,12 @@ export class FileHelper<A> {
       ),
     )
   }
+
+  async merge(data: A, effects: T.Effects) {
+    const fileData = (await this.read(effects).catch(() => ({}))) || {}
+    const mergeData = _.merge({}, fileData, data)
+    return await this.write(mergeData, effects)
+  }
   /**
    * Create a File Helper for an arbitrary file type.
    *