Add landing page

[nishant-nayak]

Description

Adds the landing page content with the updated Corpus theme.

Fixes #20

Dependencies

Couple of JS dependencies added:

• particles.js
• typeit

Type of Change

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• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration. (for bug fix / breaking change)
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Checklist

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• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes