see the answer below.
Explanation:
Answer below
get diff v1.4.16 v1.6.12 | helper-script > changes.txt
This command will compare the changes made between versions 1.4.16 and 1.6.12 of the source code in your GitHub repository, pipe the output through the helper-script and save the result to a file called "changes.txt" Please note that, this command assumes that you have a helper-script that can handle get diff output as an input and processes it further. It is not a default get command.

Explanation:
Step 1: From Developer settings in GitHub Enterprise Server, registera new OAuth app.
If you plan to use OAuth to connect Azure DevOps Services or Azure DevOps Server with your GitHub Enterprise Server, you first need to register the application as an OAuth App Step 2: Organization settings in Azure DevOps, add an OAuth configuration Register your OAuth configuration in Azure DevOps Services.
Note:
Sign into the web portal for Azure DevOps Services.
Add the GitHub Enterprise Oauth configuration to your organization.
Open Organization settings>Oauth configurations, and choose Add Oauth configuration.
Fill in the form that appears, and then choose Create.
Step 3: From Project Settings in Azure DevOps, add a GitHub connection.
Connect Azure DevOps Services to GitHub Enterprise Server
Choose the Azure DevOps logo to openProjects, and then choose the Azure Boards project you want to configure to connect to your GitHub Enterprise repositories.
Choose (1) Project Settings, choose (2) GitHub connections and then (3) Click here to connect to your GitHub Enterprise organization.
Reference:
https://docs.microsoft.com/en-us/azure/devops/boards/github/connect-to-github

See the solution below in explanation.
Explanation:
Step 1: Create a Project Wiki
Navigate to Azure DevOps:
Go to Azure DevOps and sign inwith your credentials.
Select Your Project:
Choose Project1 from your list of projects.
Create a Wiki:
In the left-hand menu, select Wiki.
Click on Create project wiki.
Enter the name Wiki1 and click Create.
Step 2: Add Mermaid Syntax to Render a Diagram
Open the Wiki Page:
Navigate to the newly created Wiki1.
Edit the Wiki Page:
Click on Edit to start editing the wiki page.
Insert Mermaid Diagram:
Use the following Mermaid syntax to render a diagram. For example, to render a simple flowchart, you canuse:
```mermaid
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
Save the Page:
Click on Save to save your changes.
Step 3: Render the TCP Handshake Diagram
Convert TCPHandshake.png to Mermaid Syntax:
Since you have a sample diagram in C:\Resources\TCPHandshake.png, you need to convert this diagram into Mermaid syntax. Here's an example of how a TCP handshake might look in Mermaid syntax:
```mermaid
sequenceDiagram
participant Client
participant Server
Client->>Server: SYN
Server-->>Client: SYN-ACK
Client->>Server: ACK
Add the Diagram to the Wiki:
Replace the sample Mermaid syntax with the TCP handshake diagram syntax in the wiki page.
Save the Page:
Click on Save to save your changes.
By following these steps, you will have created a project wiki named Wiki1 and used Mermaid syntax to render a diagram