[Feature-15875][ui]Enhance the "about Dolphinscheduler" page

[ailiujiarui]

Purpose of the pull request

Modifications to the dolphinscheduler page

Brief change log

• Increased title characters
• Added dolphinscheduler introduction
• Added official website
• Added GitHub homepage
• Added logo
• Added license information
• Reduced the size of the box

  Verify this pull request

This pull request is code cleanup without any test coverage.

(or)

This pull request is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(or)

Pull Request Notice

Pull Request Notice

If your pull request contain incompatible change, you should also add it to docs/docs/en/guide/upgrede/incompatible.md

[boring-cyborg[bot]]

Thanks for opening this pull request! Please check out our contributing guidelines. (https://github.com/apache/dolphinscheduler/blob/dev/docs/docs/en/contribute/join/pull-request.md)

[ruanwenjun]

We don't need this since this information can be found in official website and is meaningless for open source products.

+1

[SbloodyS]

Please open another meaningful PR. @ailiujiarui