Add warning for source code download producing different folder path

[ishaan119]

Add warning for source code download producing different folder path

Some users have git blocked in their environment, making the GitHub
"Code → Download ZIP" button their only option. This produces an
aidlc-workflows-main/ folder instead of the expected aidlc-rules/,
causing setup commands to fail. Added a callout with the rename fix.

Summary

Adds a WARNING callout in the README Common section to help users who download the source code zip instead of the release asset. Includes inline
rename commands for both macOS/Linux and Windows so users can quickly fix the folder path and continue with setup.

Changes

• Added a > [!WARNING] block after step 3 in the Common section of README.md
• Includes mv (macOS/Linux) and Move-Item (Windows PowerShell) commands inline to rename the extracted folder

User experience

Before: Users who download via "Code → Download ZIP" get aidlc-workflows-main/aidlc-rules/ but the setup commands reference
~/Downloads/aidlc-rules/. Commands silently fail or produce confusing "no such file" errors with no guidance on how to fix it.

After: A visible WARNING callout immediately tells users what went wrong and gives them a one-liner to fix the path before proceeding.

Checklist

• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Test Plan

• Verify the [!WARNING] callout renders correctly in GitHub markdown preview
• Confirm the mv and Move-Item commands work on a fresh source zip download
• Check that no existing README formatting or links are broken

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the project
license.