Create 3-copilot-hub.md

Author: WirelessLife

03-Introduction-to-GitHub-Copilot/.github/steps/3-copilot-hub.md

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+<!--
+  <<< Author notes: Step 3 >>>
+  Start this step by acknowledging the previous step.
+  Define terms and link to docs.github.com.
+-->
+
+## Step 3: View the GitHub Copilot tab with multiple suggestions
+
+_Nice work! You just used AI code suggestions within a C# file by using GitHub Copilot :sparkles:_
+
+Keep in mind that as you continue to use copilot, you may not want some of the suggestions GitHub Copilot offers. GitHub Copilot will show you multiple suggestions in a new tab.
+
+### :keyboard: Activity: Pull the latest code to the Codespace repo.
+
+> **Note**
+> Pull MUST be done prior to the next activity.
+
+1. Use the VS Code terminal to pull the latest code:
+
+   ```
+   git pull
+   ```
+
+### :keyboard: Activity: Add another C# method and view all suggestions
+
+1. From inside the codespace in the Solution Explorer, right click on the project, create a new file. 
+
+> Note: If you closed the Codespace from above please open it back up or create a new Codespace.
+
+2. Select **Class** and name the file `Members.cs`
+3. In the `Members.cs` file, type the following function inside of the `Member` class.
+   ```
+   public strin
+   ```
+4. Stop typing and view the Copilot suggestion by hovering over end the red squiggly grat text and select the `...`
+5. Click `Open Completions Panel`. 
+
+   > **Note**
+   > If you don't see the copilot code block suggestion or the red squiggly and the three dots `...`, you can type `control + enter` to bring up the GitHub Copilot completions panel.
+
+6. Copilot will synthesize around 10 different code suggestions or press CTRL+Enter. You should see something like this:
+   ![VS Code showing pop up with Completions Panel](./img/3-copilot-hub-0.png)
+7. Find a solution you like and click `Accept Solution`.
+8. Your `Member.cs` file will be updated with your solution.
+
+### :keyboard: Activity: Push code to your repository from the codespace
+
+1. Use the VS Code terminal to add the `Member.cs` file to the repository:
+
+   ```
+   git add Member.cs
+   ```
+
+2. Next from the VS Code terminal stage and commit the changes to the repository:
+
+   ```
+   git commit -m "Copilot second commit"
+   ```
+
+3. Finally from the VS Code terminal push to code to the repository:
+
+   ```
+   git push
+   ```
+
+**Wait about 60 seconds then refresh your repository landing page for the next step.**