Fix: Add crypto-js for the case of missing crypto.subtle in the browser

[sparkleholic]

Description of changes

crypto.subtle is avaiable if the browser open the browser example in localhost or 127.0.0.1. But it is not available if the browser open the browser example in other ip address. So we need to add crypto-js for the case of missing crypto.subtle in the browser.

Summarize the changes made by this PR.

• Improvements & Bug fixes
  • crypto.subtle is available when accessed via localhost or 127.0.0.1, but not on other IP, so crypto-js should be added as a fallback.

Test plan

How are these changes tested?

• run browser example on the remote pc, and open browser ip:3000

Documentation Changes

• N/A

[github-actions]

Reviewer Checklist

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Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
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Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)