[Bug] Fix url redirection, add default render path

[TackAdam]

Description

1. Fix url redirection
2. Add default render path when there is basePath closing : https://github.com/opensearch-project/dashboards-query-workbench/pull/381 (Support for dev tools under modal pop out) As we will make dev tools as a full page modal when new nav toggle is turned on, we will use MemoryRouter to replace HashRouter in our page to avoid modifying the hosted page' hash. And this change will impact search relevance functionality. And this PR adds a default path when there is no '/' route. For more details please take a look on the comment: https://github.com/opensearch-project/OpenSearch-Dashboards/pull/7938#discussion_r1738383931.

Tested url paths: path={/${basePath}/:dataSource} path={/${basePath}/accelerate/:dataSource} path="/" path={/${basePath}}

Old Navigation:

https://github.com/user-attachments/assets/128c154d-e4be-4ab8-ba19-3f974306b010

New Navigation:

https://github.com/user-attachments/assets/5b225238-e4e9-4181-a020-58b89981261a

New Navigation + https://github.com/opensearch-project/OpenSearch-Dashboards/pull/7938 modal applied.

https://github.com/user-attachments/assets/592fd5ff-78c7-4e3f-91f5-349fe3aaf14a

Issues Resolved

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass, including unit test, integration test and doctest
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
  • [ ] New functionality has user manual doc added
• [ ] Commits are signed per the DCO using --signoff

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[ps48]

Thanks @TackAdam for the bug fix 🥳