Issue-125: Update UX of Settings Page

[samhermes]

Summary

Fixes #125

The display issues with repeatable fields on the settings page have been resolved, and anchor tags have been swapped out in favor of button elements where appropriate. The use of jQuery on the settings page has also been refactored out.

Changes Made

• Spacing adjusted around repeatable field groups
• Removed jQuery dependency from the settings page

Testing Instructions

1. Navigate to the settings page (Settings > SEO).
2. Verify that all functionalities on the page work without errors.
3. Navigate to an "Add New" taxonomy term page.
4. Verify that the character counts work when adding a new term.
5. Navigate to the post editor screen on a post type where the plugin is enabled.
6. Verify that the character counts work when updating the title or description in the SEO settings.