Improve GitHub Copilot plans page structure and readability

[Somil450]

Why:

Closes: N/A

This update improves the readability and organization of the GitHub Copilot plans page. The goal is to make it easier for users to understand the available plans and choose the option that best fits their needs.

What's being changed:

• Improved page structure and content organization
• Enhanced plan descriptions for better clarity
• Added clearer separation between individual and enterprise plans
• Improved navigation through headings and sections
• Refined introductory content to better explain plan differences
• Improved overall readability and user experience

Preview

The updated page provides a more structured overview of GitHub Copilot plans while preserving all existing information and functionality.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
copilot/get-started/plans.md	fpt ghec	fpt ghec

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[danissulih1-dev]

y