Exercise draft (#2)

* Refactor exercise structure and update workflows for modernizing legacy COBOL application

- Removed outdated step files and replaced with new structured steps for the exercise.
- Added new step files for creating a test plan and converting COBOL code to Node.js.
- Updated workflows to reflect new step files and ensure proper execution order.
- Enhanced README with clear objectives and prerequisites for the exercise.
- Introduced COBOL source files for the legacy accounting system.
- Updated .gitignore to exclude COBOL binaries and Node.js modules.

* Update README.md

fix default template naming

* fix: enable next step workflow by removing workflow disable command

Author: arilivigni

.github/steps/2-explain-legacy-code.md

@@ -0,0 +1,70 @@
+## Step 2: Understanding the School's Legacy COBOL Accounting System
+
+In this step, you'll explore the school's legacy COBOL accounting system to understand its structure and functionality. This will help you prepare for the modernization process.
+
+### ⌨️ Activity: Exploring the School's Legacy Accounting System
+
+1. Take a few minutes to explore the COBOL files in the repository (`main.cob`, `operations.cob`, and `data.cob`)
+1. Open `src/cobol/main.cob`, `src/cobol/operations.cob`, `src/cobol/data.cob` and select "Agent" from the Copilot Chat window.
+1. click "Add Context..." in the Copilot Chat sidebar and click "Open Editors" to add the open COBOL files as context.
+1. Explain the purpose of each file in the context of the school's accounting system:
+   - `main.cob`: This file contains the main program logic for managing student accounts, including user interaction and menu options.
+   - `operations.cob`: This file implements the core operations for processing payments, recording purchases, and managing student balances.
+   - `data.cob`: This file handles data storage and retrieval for student account balances.
+1. Create a docs/README.md file in the repository and document your findings, including:
+   - The purpose of each COBOL file
+   - Key functions and operations performed by the system
+   - Any specific business rules or constraints related to student accounts
+  
+    > ![Static Badge](https://img.shields.io/badge/-Prompt-text?style=social&logo=github%20copilot)
+    >
+    > ```prompt
+    > @workspace Create a README.md file in a new /docs directory folder in the repository. Document the purpose of each COBOL file, key functions, and any specific business rules related to student accounts.
+    > ```
+
+<details>
+<summary>Having trouble? 🤷</summary><br/>
+
+- COBOL is a column-sensitive language. The code is organized in divisions (IDENTIFICATION, DATA, PROCEDURE) and sections.
+- The `main.cob` file handles the user interface and menu options (view student balance, process payment, record purchase, exit)
+- The `operations.cob` file contains the logic for different student account operations
+- The `data.cob` file manages the storage of student account balances
+
+</details>
+
+### ⌨️ Activity: Create a data flow diagram
+
+Create a Mermaid data flow diagram (DFD) that illustrates how data moves through the school's accounting system.
+
+  > ![Static Badge](https://img.shields.io/badge/-Prompt-text?style=social&logo=github%20copilot)
+  >
+  > ```prompt
+  > @workspace can you create a sequence diagram of the app showing the data flow of the app. Please create this in mermaid format so that I can render this in the docs/README.md markdown file.
+  > ```
+
+Make sure you can preview the diagram in the `docs/README.md` file.
+
+1. In the left sidebar, select the `Source Control` tab and make sure you are making changes on `modernize-legacy-code`branch.
+
+   > **Tip:** Opening a file from the source control area will show the differences to the original rather than simply opening it.
+
+1. Find the `docs/README.md` file and press the `+` sign to collect your changes together in the staging area.
+
+1. Above the list of staged changes, find the **Message** text box, but **don't enter anything** for now.
+
+   - Typically, you would write a short description of the changes here, but now we have Copilot to help out!
+
+1. To the right of the **Message** text box, find and click the **Generate Commit Message with Copilot** button (sparkles icon).
+
+1. Press the **Commit** button and **Sync Changes** button to push your changes to the `modernize-legacy-code`branch on GitHub.
+
+1. Wait a moment for Mona to check your work, provide feedback, and share the next lesson.
+
+<details>
+<summary>Having trouble? 🤷</summary><br/>
+
+If you don't get feedback, here are some things to check:
+
+- Make sure your pushed the `docs/README.md` file changes to the branch `modernize-legacy-code`.
+
+</details>

.github/workflows/0-start-exercise.yml

@@ -68,7 +68,6 @@ jobs:
 
       - name: Enable next step workflow
         run: |
-          gh workflow disable "${{github.workflow}}"
           gh workflow enable "Step 1"
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}