feat(framework): adjust the directory structure for the framework

[churchill-zhang]

Pre-PR Checklist

• I added/updated relevant documentation.
• I followed the Convention Commit guideline with maximum 72 characters to submit commit message.
• I squashed the repeated code commits.
• I signed the [CLA].
• I added/updated test cases to check the change I am making.
• All existing and new tests are passing.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (v3.0-dev@1d2780c). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 5fe860e differs from pull request most recent head d06018d. Consider uploading reports for the commit d06018d to get more accurate results

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[github-actions]

👋 Thanks for your contributing!

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[medns]

Close this PR and commit with the new branch

[medns]

LGTM