Standardize page title styling across all sections

[sunehachoudhary]

Description:
This PR fixes inconsistencies in page title styling across the site.

• Unified spacing (margins and padding).
• Standardized font sizes for titles to maintain hierarchy.
• Applied a consistent text color that matches the design system.

These updates ensure page titles now look consistent, improving overall readability and visual cohesion across sections.

Reference:

Fixes #800 issue.

[github-actions]

Thanks for creating a PR for your Issue! ☺️

We'll review it as soon as possible.
In the meantime, please double-check the file changes and ensure that all commits are accurate.

If there are any unresolved review comments, feel free to resolve them. 🙌🏼