docs: Docs update only

[DocGailZhou]

Purpose

• ...

Does this introduce a breaking change?

• Yes
• [x ] No

How to Test

• Get the code

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

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[Copilot]

Pull request overview

This PR updates documentation across multiple files to improve clarity and consistency. The changes include refining descriptions in the Fabric Data Agent guide, updating file references, adding a new Azure account setup guide, and enhancing the README with clearer explanations of the solution's capabilities.

• Improved documentation clarity in FabricDataAgentGuide.md with more detailed instructions and file references
• Updated file reference from sample_test_questions.md to user_sample_test_questions.md
• Added new AzureAccountSetUp.md with Azure subscription setup instructions

Reviewed changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 4 comments.

File	Description
docs/FabricDataAgentGuide.md	Enhanced setup instructions, updated terminology from "EventHouse" to "KQL Database", restructured example files section, and added UI screenshot reference
docs/DemonstratorGuide.md	Updated file reference to match renamed sample questions file
docs/AzureAccountSetUp.md	New file providing Azure account and subscription setup instructions with permission requirements
README.md	Refined solution description for better clarity and removed trailing period for list consistency

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[Copilot]

Grammar issue: Missing the word "a" before "clickable resource". The sentence should read "you will be presented the clickable resource" → "you will be presented with a clickable resource".

Suggested change

After you have deployed your solution, you can add Azure Data Agent to get data analysis features from Fabric built-in AI capabilities. You can follow [Microsoft's Fabric Data Agent Guide](https://learn.microsoft.com/en-us/fabric/data-science/how-to-create-data-agent) to create and set up your Fabric Data Agent, and use the materials provided here to set up your agent quickly. For example, you can create a mew item, search for 'data agent', you will be presented the clickable resource to create a Fabric Data Agent.

After you have deployed your solution, you can add Azure Data Agent to get data analysis features from Fabric built-in AI capabilities. You can follow [Microsoft's Fabric Data Agent Guide](https://learn.microsoft.com/en-us/fabric/data-science/how-to-create-data-agent) to create and set up your Fabric Data Agent, and use the materials provided here to set up your agent quickly. For example, you can create a new item, search for 'data agent', you will be presented with a clickable resource to create a Fabric Data Agent.