updated blog nav + author profile section + updated tag list (#4606)

fixes [#4483](#4483),
#4482, #4484
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## PR Type
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<!-- - Bugfix -->
Feature
<!-- - Code style update (formatting) -->
<!-- - Refactoring (no functional changes, no api changes) -->
<!-- - Build or CI related changes -->
<!-- - Documentation content changes -->
<!-- - Sample app changes -->
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## Describe the current behavior?
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to a relevant issue. -->
Old nav just leads to docs and github
No author profile
tag list is clutter and has redundant tags

## Describe the new behavior?
New nav matches that of pwabuilder.com
Author profile section exists now
tag list is clean and has intentional categories

## PR Checklist

- [x] Test: run `npm run test` and ensure that all tests pass
- [x] Target main branch (or an appropriate release branch if
appropriate for a bug fix)
- [x] Ensure that your contribution follows [standard accessibility
guidelines](https://docs.microsoft.com/en-us/microsoft-edge/accessibility/design).
Use tools like https://webhint.io/ to validate your changes.

## Additional Information