feat: Add validators fee voting tab & reorganize Network tab

[pdp2121]

High Level Overview of Change

This PR is trying to achieve the following:

• Add voting (for fee voting) and uptime (similar to the existing page) for validators page.
• Remove "validators", "nodes", and "upgrade status" tabs for Network. Each now would be a separate page under Network in top nav bar.
• Refactor ValidatorsTable.jsx into TypeScript hooks.

Resolve: https://github.com/ripple/explorer/issues/1058

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Refactor (non-breaking change that only restructures code)
• [ ] Tests (You added tests for code that already exists, or your new feature included in this PR)
• [ ] Documentation Updates
• [ ] Translation Updates
• [ ] Release

TypeScript/Hooks Update

• [x] Updated files to React Hooks
• [x] Updated files to TypeScript

Before / After

Validators page (Uptime):

Validators page (Voting):

Voting Mobile View:

Upgrade Status: