Replace generator-exercise with plop generator

plopFile.js

@@ -0,0 +1,43 @@
+const { mkdir } = require("fs/promises");
+const { join } = require("path");
+const { createExerciseDirectoryName } = require("./generators/helpers");
+const { writeReadme } = require("./generators/writeReadme");
+const { writeExercise } = require("./generators/writeExercise");
+const { writeExerciseSpec } = require("./generators/writeExerciseSpec");
+
+module.exports = function (plop) {
+  plop.setActionType("createExercise", async function (answers) {
+    const { exerciseName } = answers;
+    if (!exerciseName) {
+      throw new Error(
+        `Invalid exerciseName. Expected: valid string. Actual: "${exerciseName}"`
+      );
+    }
+
+    const exerciseDirectoryName = await createExerciseDirectoryName(
+      exerciseName
+    );
+    const basePath = join("./", exerciseDirectoryName);
+    const solutionPath = join(basePath, "solution");
+
+    await mkdir(basePath);
+    await mkdir(solutionPath);
+    await writeReadme(basePath);
+    await writeExercise(basePath);
+    await writeExercise(solutionPath);
+    await writeExerciseSpec(basePath);
+    await writeExerciseSpec(solutionPath);
+  });
+
+  plop.setGenerator("Basic", {
+    description: "Create a basic JavaScript exercise.",
+    prompts: [
+      {
+        type: "input",
+        name: "exerciseName",
+        message: "What is the name of the exercise? (camelCase)",
+      },
+    ],
+    actions: [{ type: "createExercise" }],
+  });
+};