Remove kmap layout and instead use default layout

[mohit-003]

Fixes: #223 ~~and #236~~

The kmap layout is removed, and the default layout is used instead of it in Intractive Karnaugh Map page, and some dark-mode issues of the same page are resolved.

Before:

After:

Light-mode is not affected much

[mohit-003]

@tachyons Please review.

[aayushgupta05]

This looks good, but I am not very sure if we are currently switching to a central default layout for all pages. Also I will have to check that it is not affecting other pages.

[mohit-003]

I checked all other pages and only the K-map page used kmap layout and all other pages are using the default layout.

[ShubhankarKG]

Resolved in #297 via #295 . @YashKumarVerma can be closed.