Enabled dark and light mode with switch for docs using docsify-darklight-theme

[boopathikumar018]

Insert description of PR here

Enabled dark and light mode with switch for docs using docsify-darklight-theme with redesigned search bar. For more customization see here

Light Mode :

Before

After

Dark Mode :

✅️ By submitting this PR, I have verified the following

Guidelines

Content

If adding new advice or content,

• [] A tool like Grammarly was utilized to check for spelling and grammar.

Resources

If adding a new resource,

• There is a link to the resource.
• [] There is a description describing what benefits the resource offers.

Formatting

• [] No whitespace.
• [] Spaces, not tabs. Specifically, 2 spaces.
• [] Make sure items in lists are alphabetized.

Adding yourself as a contributor.

• Added my name to the bottom of the list under the Credits section in the README.md with a link to my website or GitHub profile 👥️