docs: Added Troubleshoot.md file to ensure user can deploy app without any errors.

[NirajC-Microsoft]

This pull request introduces improvements to documentation and backend code, focusing on deployment guidance, troubleshooting, and error handling. The most significant changes include adding a troubleshooting guide, refining deployment instructions, and improving error messages in the backend.

Documentation Updates:

• docs/DeploymentGuide.md: Added a troubleshooting link to assist users in resolving deployment issues.
• docs/Troubleshoot.md: Introduced a comprehensive troubleshooting guide, including steps to enable the AllowBringYourOwnPublicIpAddress feature and avoid the ResourceGroupNotFound error during Azure deployment.

Backend Code Improvements:

• src/backend/app_kernel.py: Updated the allow_origins parameter in the CORSMiddleware configuration to clarify that all origins are allowed for development but should be restricted in production.
• src/backend/app_kernel.py: Enhanced error handling in the input_task_endpoint function by replacing rate limit error messages with a more user-friendly message indicating temporary unavailability due to quota limits.
• src/backend/app_kernel.py: Simplified error message formatting in the input_task_endpoint function to avoid redundancy.## Purpose

• ...

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information