feat: Provide an explanation to users about what a GTFS Component is #1505

[cka-y]

Summary:

The GTFS Component now has a description to help the user understand its value.
The summary section is as wide as the compliance report.

Expected behavior:

Closes #1505
Closes #1467

Also fixes missing summary section for notices and missing description for the notice's fields.
Before:

With the changes:

Please make sure these boxes are checked before submitting your pull request - thanks!

• Run the unit tests with gradle test to make sure you didn't break anything
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)

[davidgamez]

LGTM!

[github-actions]

✅ Rule acceptance tests passed.
New Errors: 0 out of 1435 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Errors: 0 out of 1435 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
New Warnings: 0 out of 1435 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Warnings: 0 out of 1435 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
0 out of 1435 sources (~0 %) are corrupted.
Commit: c2d32a1
Download the full acceptance test report here (report will disappear after 90 days).
✅ Rule acceptance tests passed.