Enhance site interface with CSS to more clearer and cleaner one, and minor site enhancements

[Git-Harshit]

This commit adds improved looks to the light (non-dark) theme specifically, by lightening the background. Also, the theme toggler now indicates the current theme when toggled. Alongside, the commit now sets clickable links for user profiles followers, following, public repositories, and starred content. It also adds two headings to user profile details: users GitHub Pages hosted website, and Bio (About User). This PR is made in response to Issue #57.

Description

The updated code mainly aims at enhancing the site appearance, fixing issues like invisibility of darker text over darker section. Also, it involves minor code and performance improvisations.

Resolves #57

Type of Change:

• User Interface
• Minor Code Refactoring and functionality enhancement.

Screenshots

Screenshots of the proposed changes compared with the current version.

• Here, you can see that the default theme is more lightened than before, which eases readability of black text over it, in light theme.

• The Light Theme Background previously set now seems to be a good choice and a good fit for the light theme, visually better appealing than before.

• Here's how the dark theme looks on home page. Also notice the text of theme toggler to be changed to dark theme.

• This is the newer look of the theme toggler when hovered (placed a mouse over it) on home page.

• This is the newer look of the buttons when hovered on home page.

• Check out the direct links that are made available for followers, following, repositories and stars tabs.

• Introducing optional column (named Custom Site)! Notice that it is visible only for those who have setup a custom site, hosted at their respective GitHub Page (In the image, it is available at 3rd row for the profile at right, whereas it isn't detected, and therefore the row is ommitted, for the profile at left).

For older versions, of the displayed snippets, please check out the current version (before this PR is merged) of the project.

Additional Note:

Please add relevant labels to issue #57 like CH20, enhancement, and others (if not yet added, @Aakansha99) before merging this PR against the issue. It is all set, thanks to the repo owner!

Checklist:

• [x] My code follows the style guidelines(Clean Code) 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
• [x] I have added tests/screenshots(If any) that prove my fix is effective or that my feature works

[Aakansha99]

Please add screenshots for the same

[Git-Harshit]

@Aakansha99, I have updated the PR description with added screenshots, and have also resolved a merge conflict with index.html file of base branch. Please have a look at it now.

[Git-Harshit]

Please let me know if the PR could be accepted and merged with the base branch, I'll fix the branch conflicts, just again. Else, feel free to close the PR.

[Pawansinghla]

please resolve these merge conflicts