added darkmode to website

[arpit456jain]

Description:

added darkmode to website

Fixes #181

Type of change:

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

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [] I have made corresponding changes to the documentation.
• [x] 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.
• [ ] Any dependent changes have been merged and published in downstream modules.

Screenshots / Video:

https://user-images.githubusercontent.com/55352601/118792615-72d3b300-b8b5-11eb-89ad-efe6431f5a3b.mp4

[arpit456jain]

@SaiSudhaV @sruti2024

[sruti2024]

can u pls add this to all the pages?

[arpit456jain]

can u pls add this to all the pages?

I think only one page is left... That view projects details

If other than this any page is left please let me know @sruti2024 And i will add dark mode to it in an hour so please try to review it again after 1 hour

[arpit456jain]

@sruti2024 I had added dark mode in modules.html since there is no navbar the toggle button was not adding properly so i add it below the header if any page is left i will add it another PR

[arpit456jain]

@sruti2024 @SaiSudhaV

[arpit456jain]

@sruti2024 please merge this

[Aryamanz29]

Hii 👋@arpit456jain Please add internal CSS to their respective external CSS files